Pyrethrin

(thing) by CentrX Sun Dec 03 2000 at 19:06:28
Either of two liquid esters, C21H28O3 or C22H28O5, derived from chrysanthemums. It is the active ingredient of pyrethrum.
del.icio.us Furl Facebook Digg StumbleUpon Reddit   (I like it!)
(definition) by Webster 1913 Wed Dec 22 1999 at 2:23:46

Pyr"eth*rin (?), n. [NL. Pyrethrum, generic name of feverfew, Gr. feverfew.] Chem.

A substance resembling, and isomeric with, ordinary camphor, and extracted from the essential oil of feverfew; -- called also Pyrethrum camphor.

 

© Webster 1913.

del.icio.us Furl Facebook Digg StumbleUpon Reddit
Y'know, if you log in, you can write something here, or contact authors directly on the site. Create a New User if you don't already have an account.