Complex /(kŏm"plĕks)/

Com·plex

Complex

a.
  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.
  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.

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

Complex

n.
  1. 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.

Phrases & Compounds
Complex of lines
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.