(graph theory, computer science, discrete mathematics:)

A connected (undirected!) graph with no cycles. A finite tree on n vertices has exactly n-1 edges.

In computer science, trees are often in fact rooted trees. (In the finite case, this is the same thing as being a directed tree; however infinite trees can be directed without having a root.)

Trees are divided into two main categories: deciduous and coniferous. Forests are usually categorized as one or the other, or as a mix between the two.

Almost 50% of the biomass of a tree lies in the root system below ground. Here the roots, in symbiosis with various benign fungal growths, exchange carbon dioxide for soil-based nutrients such as nitrogen.

KANJI: BOKU MOKU (tree, wood)

ASCII Art Representation:

                      %%%%                 ,%%,
                %%%%%%%%%% "%%,
               %%%%%% %%%%  "%%%,
              %%%%%%  %%%%   "%%%,
             %%%%%"   %%%%    "%%%%,
            %%%%%"    %%%%      %%%%%,
          ,%%%%"      %%%%       "%%%%%,,
         ,%%%%"       %%%%        "%%%%%%%%,
       ,%%%""         %%%%          "%%%%%%%%%,,
     ,%%%"            %%%%            "%%%%%%%%"
   ,%%""              %%%%              "%%%%%%
,,%""                 %%%%                "%%%
"                     %%%%                   "

Character Etymology:

A pictograph of a tree with sweeping branches.

A Listing of All On-Yomi and Kun-Yomi Readings:

on-yomi: BOKU MOKU
kun-yomi: ki ko-

Nanori Readings:

Nanori: gu mo moto

English Definitions:

  1. BOKU: tree.
  2. MOKU: tree; Thursday.
  3. ki, ko: tree; wood; timber; lumber; wooden clappers.

Character Index Numbers:

New Nelson: 2531
Henshall: 69

Unicode Encoded Version:

Unicode Encoded Compound Examples:

木曜 (mokuyoubi): Thursday.
(bokutou): wooden sword.
(mokuba): rocking horse.

  Previous: literature  |  The Japanese Kanji Metanode  |  Next: book

Is a band local to the Boston and Worcester areas, formed back in 1990. Comprised of River on vocals, Jake on bass, Billy on drums and Ooze on guitar, Tree plays a mixture of punk, hardcore, groove and rock, which provides a solid foundation for their radical lyrics (kinda like RATM).


Tree's official webpage is at www.treemusic.com. Most of this information came from there.

Everything2 tree write-ups

This will be an on-going project.

I am trying to compile a list of trees contributed by noders. There must be hundreds of them, so /msg BlueDragon if you find or write any and I'll add them to the list.

A whole lot of these need rescuing, so please be inspired!


Acer, Japanese maple
Agnus castus, Chaste tree
Apple tree
Atlas Cedar Tree


Bay tree
Beam tree
Blue spruce
Brazil nut, para nut
Bo tree
Box tree
Bristlecone pine
Bull's horn acacia
Bunya pine


Candle nut
Candleberry tree
Cannonball tree
Cedar of Lebanon
Cherry Tree
Coolibah tree
Cow tree
Christmas tree
Colorado Blue Spruce, aka silver spruce,
Cork tree
Creosote Bush


Date palm


Elderberry, aka Elder, Black Elder, Common Elder, Pipe Tree, Bore Tree, Bour Tree
Empress of China
Eucalyptus, aka coolibah tree, gum tree


Fir tree
Flame tree Fusanum, aka Fusora


Garry oak
Grass Tree
Ginkgo biloba
Gum tree


Hep tree
Holm Oak
Horse Chestnut Tree, aka Conker tree
Hevea Brasiliensis


Ironwood, aka ironbark tree


Jagua palm
Japanese fern tree
Joshua Tree
Judas tree
Jupati palm


Kola nut


Live oak
Locust tree


Macadamia nut, aka Queensland nut
Madrona, Madrone
Mahwa tree
Monkey puzzle tree
Morus, Mulberry
Mountain ash


Neem tree
Norwegian pine
Nux vomica




Palm tree
Palo verde
Peepul tree, Pippul tree, Pipal tree
Persimmon, Sharon fruit
Plane tree, Platanus
Ponderosa Pine
Poplar, Cottonwood, Aspen


Quaking Aspen


Radiata pine, aka insignis pine, Monterey pine, Cambria pine, Guadalupe Island pine, Cedros Island pine
Rowan aka Quickbeam, Mountain ash
Rubber tree


Shea tree
Shittah tree
Silk floss tree
Scots Pine
Soapberry tree
Spindle tree
Sweet Chestnut


Tea tree
Tree of Heaven
Trident Maple
Tulip Poplar


Whistling Thorn Acacia
White oak
Wild service tree
Wollemi pine




A very convenient DOS command for listing directories in a tree format. Ported to UNIX and other operating systems, and available under the various flavors of Windows. Very convenient for making data CD paper maps.

The command has two options

  • /A - Specifies that alternative characters (plus signs, hyphens, and vertical bars) be used to draw the tree diagram. Very convenient for taking tree displays out of the DOS planet.
  • /F - Displays the names of the files found within each directory listed.
syntax is tree an optional path indication /a /f : if you omit the path indication, tree will start from the current directory.

Example: the tree /a /f listing of a VCD

Volume serial number is 0006FE80 FDE3:3A23
|       CDI_IMAG.RTF
|       CDI_TEXT.FNT
|       CDI_VCD.APP
|       CDI_VCD.CFG
|       LOT_X.VCD
|       PSD_X.VCD
|       AVSEQ01.DAT

The form of a tree is a phenotype that certain plants take on. Trees are not a single family of botanical lifeforms, but are rather an example of convergent evoloution, where many widely different types of plants have evolved the same basic shape for different reasons. Because of this, "tree" is basically a useless term as a biological classifier, since a fifteen meter tall Black Cherry tree is much more biologically related to a tiny strawberry plant then it is to a phenotypically similiar tree, such as an Alder. Trees can be both gymnosperms and angiosperms, and amongst the angiosperms, trees are almost always dicots, plants characterized by net-like venation, two seed leafs at germation and a generally more complicated structure.

The definition of tree given Webster 1913 is fairly accurate :

Any perennial woody plant of considerable size (usually over twenty feet high) and growing with a single trunk
although there are certain exceptions to these rules. For example, palm trees are not actually trees, since they do not produce true wood. A birch tree is definitely a tree, yet they commonly will have two or three main trunks coming from the same root system. The largest problem is with the size qualification. Quite often, whether a given seed grows into a "tree" or a "shrub" is a matter of chance. Two identical seeds may grow into a large, single trunked tree in one location, and into a low, shrubby bush in another location. Thus, even within a species, or even within genetically identical specimens, the term "tree" does not mean much more then a collection of possible traits.

Tree (?), n. [OE. tree, tre, treo, AS. treo, treow, tree, wood; akin to OFries. tr, OS. treo, trio, Icel. tr, Dan. trae, Sw. tra, trad, Goth. triu, Russ. drevo, W. derw an oak, Ir. darag, darog, Gr. a tree, oak, a beam, spear shaft, spear, Skr. dru tree, wood, daru wood. , . Cf. Dryad, Germander, Tar, n., Trough.]

1. Bot.

Any perennial woody plant of considerable size (usually over twenty feet high) and growing with a single trunk.

The kind of tree referred to, in any particular case, is often indicated by a modifying word; as forest tree, fruit tree, palm tree, apple tree, pear tree, etc.


Something constructed in the form of, or considered as resembling, a tree, consisting of a stem, or stock, and branches; as, a genealogical tree.


A piece of timber, or something commonly made of timber; -- used in composition, as in axletree, boottree, chesstree, crosstree, whiffletree, and the like.


A cross or gallows; as Tyburn tree.

[Jesus] whom they slew and hanged on a tree. Acts x. 39.


Wood; timber.



In a great house ben not only vessels of gold and of silver but also of tree and of earth. Wyclif (2 Tim. ii. 20).

6. Chem.

A mass of crystals, aggregated in arborescent forms, obtained by precipitation of a metal from solution. See Lead tree, under Lead.

Tree bear Zool., the raccoon. [Local, U.S.] -- Tree beetle Zool. any one of numerous species of beetles which feed on the leaves of trees and shrubs, as the May beetles, the rose beetle, the rose chafer, and the goldsmith beetle. -- Tree bug Zool., any one of numerous species of hemipterous insects which live upon, and suck the sap of, trees and shrubs. They belong to Arma, Pentatoma, Rhaphigaster, and allied genera. -- Tree cat Zool., the common paradoxure (Paradoxurus musang). -- Tree clover Bot., a tall kind of melilot (Melilotus alba). See Melilot. -- Tree crab Zool., the purse crab. See under Purse. -- Tree creeper Zool., any one of numerous species of arboreal creepers belonging to Certhia, Climacteris, and allied genera. See Creeper, 3. -- Tree cricket Zool., a nearly white arboreal American cricket (Ecanthus niv&oe;us) which is noted for its loud stridulation; -- called also white cricket. -- Tree crow Zool., any one of several species of Old World crows belonging to Crypsirhina and allied genera, intermediate between the true crows and the jays. The tail is long, and the bill is curved and without a tooth. -- Tree dove Zool. any one of several species of East Indian and Asiatic doves belonging to Macropygia and allied genera. They have long and broad tails, are chiefly arboreal in their habits, and feed mainly on fruit. -- Tree duck Zool., any one of several species of ducks belonging to Dendrocygna and allied genera. These ducks have a long and slender neck and a long hind toe. They are arboreal in their habits, and are found in the tropical parts of America, Africa, Asia, and Australia. -- Tree fern Bot., an arborescent fern having a straight trunk, sometimes twenty or twenty-five feet high, or even higher, and bearing a cluster of fronds at the top. Most of the existing species are tropical. -- Tree fish Zool., a California market fish (Sebastichthys serriceps). -- Tree frog. Zool. (a) Same as Tree toad. (b) Any one of numerous species of Old World frogs belonging to Chiromantis, Rhacophorus, and allied genera of the family Ranidae. Their toes are furnished with suckers for adhesion. The flying frog (see under Flying) is an example. -- Tree goose Zool., the bernicle goose. -- Tree hopper Zool., any one of numerous species of small leaping hemipterous insects which live chiefly on the branches and twigs of trees, and injure them by sucking the sap. Many of them are very odd in shape, the prothorax being often prolonged upward or forward in the form of a spine or crest. -- Tree jobber Zool., a woodpecker. [Obs.] -- Tree kangaroo. Zool. See Kangaroo. -- Tree lark Zool., the tree pipit. [Prov. Eng.] -- Tree lizard Zool., any one of a group of Old World arboreal lizards (Dendrosauria) comprising the chameleons. -- Tree lobster. Zool. Same as Tree crab, above. -- Tree louse Zool., any aphid; a plant louse. -- Tree moss. Bot. (a) Any moss or lichen growing on trees. (b) Any species of moss in the form of a miniature tree. -- Tree mouse Zool., any one of several species of African mice of the subfamily Dendromyinae. They have long claws and habitually live in trees. -- Tree nymph, a wood nymph. See Dryad. -- Tree of a saddle, a saddle frame. -- Tree of heaven Bot., an ornamental tree (Ailantus glandulosus) having long, handsome pinnate leaves, and greenish flowers of a disagreeable odor. -- Tree of life Bot., a tree of the genus Thuja; arbor vitae. -- Tree onion Bot., a species of garlic (Allium proliferum) which produces bulbs in place of flowers, or among its flowers. -- Tree oyster Zool., a small American oyster (Ostrea folium) which adheres to the roots of the mangrove tree; -- called also raccoon oyster. -- Tree pie Zool., any species of Asiatic birds of the genus Dendrocitta. The tree pies are allied to the magpie. -- Tree pigeon Zool., any one of numerous species of longwinged arboreal pigeons native of Asia, Africa, and Australia, and belonging to Megaloprepia, Carpophaga, and allied genera. -- Tree pipit. Zool. See under Pipit. -- Tree porcupine Zool., any one of several species of Central and South American arboreal porcupines belonging to the genera Chaetomys and Sphingurus. They have an elongated and somewhat prehensile tail, only four toes on the hind feet, and a body covered with short spines mixed with bristles. One South American species (S. villosus) is called also couiy; another (S. prehensilis) is called also c&oe;ndou. -- Tree rat Zool., any one of several species of large ratlike West Indian rodents belonging to the genera Capromys and Plagiodon. They are allied to the porcupines. -- Tree serpent Zool., a tree snake. -- Tree shrike Zool., a bush shrike. -- Tree snake Zool., any one of numerous species of snakes of the genus Dendrophis. They live chiefly among the branches of trees, and are not venomous. -- Tree sorrel Bot., a kind of sorrel (Rumex Lunaria) which attains the stature of a small tree, and bears greenish flowers. It is found in the Canary Islands and Teneriffe. -- Tree sparrow Zool. any one of several species of small arboreal sparrows, especially the American tree sparrow (Spizella monticola), and the common European species (Passer montanus). -- Tree swallow Zool., any one of several species of swallows of the genus Hylochelidon which lay their eggs in holes in dead trees. They inhabit Australia and adjacent regions. Called also martin in Australia. -- Tree swift Zool., any one of several species of swifts of the genus Dendrochelidon which inhabit the East Indies and Southern Asia. -- Tree tiger Zool., a leopard. -- Tree toad Zool., any one of numerous species of amphibians belonging to Hyla and allied genera of the family Hylidae. They are related to the common frogs and toads, but have the tips of the toes expanded into suckers by means of which they cling to the bark and leaves of trees. Only one species (Hyla arborea) is found in Europe, but numerous species occur in America and Australia. The common tree toad of the Northern United States (H. versicolor) is noted for the facility with which it changes its colors. Called also tree frog. See also Piping frog, under Piping, and Cricket frog, under Cricket. -- Tree warbler Zool., any one of several species of arboreal warblers belonging to Phylloscopus and allied genera. -- Tree wool Bot., a fine fiber obtained from the leaves of pine trees.


© Webster 1913.

Tree (?), v. t. [imp. & p. p. Treed (?); p. pr. & vb. n. Treeing.]


To drive to a tree; to cause to ascend a tree; as, a dog trees a squirrel.

J. Burroughs.


To place upon a tree; to fit with a tree; to stretch upon a tree; as, to tree a boot. See Tree, n., 3.


© Webster 1913.

Log in or register to write something here or to contact authors.