**Com"plex** (?), a. [L. *complexus*, p. p. of *complecti* to entwine around, comprise; *com-* + *plectere* to twist, akin to *plicare* to fold. See Plait, n.]

**1.**

Composed of two or more parts; composite; not simple; as, a **complex** being; a **complex** idea.

Ideas thus made up of several simple ones put together, I call **complex**; such as beauty, gratitude, a man, an army, the universe.
*Locke.*

**2.**

Involving many parts; complicated; intricate.

When the actual motions of the heavens are calculated in the best possible way, the process is difficult and **complex**.
*Whewell.*

Complex fraction. See Fraction. -- Complex number Math., in the theory of numbers, an expression of the form a + b&root;-1, when a and b are ordinary integers.

Syn. -- See Intricate.

© Webster 1913.

**Com"plex**, n. [L. *complexus*]

Assemblage of related things; collection; complication.

This parable of the wedding supper comprehends in it the whole **complex** of all the blessings and privileges exhibited by the gospel.
*South.*

Complex of lines Geom., all the possible straight lines in space being considered, the entire system of lines which satisfy a single relation constitute a *complex*; as, all the lines which meet a given curve make up a *complex*. The lines which satisfy two relations constitute a *congruency* of lines; as, the entire system of lines, each one of which meets two given surfaces, is a *congruency*.

© Webster 1913.