An example of dichotomy is grouping mammals by those that live on land and those that live in water.
Origin of dichotomy
- Greek dikhotomiā from dikhotomos divided in two dikho- dicho- temnein to cut tem- in Indo-European roots
From American Heritage Dictionary of the English Language, 5th Edition
- From Ancient Greek διχότομος (dikhotomos, “equally divided, cut in half”).