noun a cutting in two; a division.
2. dichotomy ·noun the place where a stem or vein is forked.
3. dichotomy ·noun division or distribution of genera into two species; division into two subordinate parts.
4. dichotomy ·noun that phase of the moon in which it appears bisected, or shows only half its disk, as at the quadratures.
5. dichotomy ·noun 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.
6. dichotomy ·noun 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.