dichotomy

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Related to Jointly exhaustive: dichotomous, dichotomies

dichotomy

1. Logic the division of a class into two mutually exclusive subclasses
2. Botany a simple method of branching by repeated division into two equal parts
3. the phase of the moon, Venus, or Mercury when half of the disc is visible

dichotomy

(dÿ-kot -ŏ-mee) The moment of exact half-phase of the Moon, Mercury, or Venus.

dichotomy

[dī′käd·ə·mē]
(astronomy)
The phase of the moon or an inferior planet at which exactly half of its disk is illuminated and the terminator is a straight line.
(biology)
Divided in two parts.
Repeated branching or forking.
(computer science)
A division into two subordinate classes; for example, all white and all nonwhite, or all zero and all nonzero.