dichotomy

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Related to Jointly exhaustive: dichotomous, dichotomies

di·chot·o·my

(dī-kot'ō-mē),
Division into two parts.
[G. dichotomia, a cutting in two, fr. dicha, in two, + tomē, a cutting]

dichotomy

(dī-kŏt′ə-mē)
n. pl. dichoto·mies
1. A division into two contrasting things or parts: "the dichotomy of the one and the many" (Louis Auchincloss).
2. Astronomy The phase of the moon, Mercury, or Venus when half of the disk is illuminated.
3. Botany Branching characterized by successive forking into two approximately equal divisions.

dichotomy

, dichotomization (dī-kot′ŏ-mē) (dī-kot″ŏ-mĭ-zā′shŏn) [Gr. dicha, twofold, + tome, incision]
1. Bifurcation of a vein.
2. Cutting or dividing into two parts.