WordDictionary

Noun:

• A cutting in two; a division.
• an either-or perspective
• conditions perceived as polar extremes or opposites
• 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.
• Division or distribution of genera into two species; division into two subordinate parts.
• 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.
• The phase of the moon in which it appears bisected, or shows only half its disk, as at the quadratures.
• The place where a stem or vein is forked.