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The Collaborative International Dictionary of English v.0.48 (gcide)

Dichotomy \Di*chot"o*my\, n. [Gr. ?, fr. ?: cf. F. dichotomie.
See {Dichotomous}.]
1. A cutting in two; a division.
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A general breach or dichotomy with their church.
--Sir T.
Browne.
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2. Division or distribution of genera into two species;
division into two subordinate parts.
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3. (Astron.) That phase of the moon in which it appears
bisected, or shows only half its disk, as at the
quadratures.
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4. (Biol.) Successive division and subdivision, as of a stem
of a plant or a vein of the body, into two parts as it
proceeds from its origin; successive bifurcation.
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5. The place where a stem or vein is forked.
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6. (Logic) Division into two; especially, the division of a
class into two subclasses opposed to each other by
contradiction, as the division of the term man into white
and not white.
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