Definition that contains either
- end either extremity of something that has length
- side either the left or right half of a body
- sex either of the two categories (male or female) into which most organisms are divided
- hip either side of the body below the waist and above the thigh
- trace either of two lines that connect a horse's harness to a wagon or other vehicle or to a whiffletree
- breast either of two soft fleshy milk-secreting glandular organs on the chest of a woman
- twin either of two offspring born at the same time from the same pregnancy
- lip either the outer margin or the inner margin of the aperture of a gastropod's shell
- lip either of two fleshy folds of tissue that surround the mouth and play a role in speaking
- lung either of two saclike respiratory organs in the chest of vertebrates; serves to remove carbon dioxide and provide oxygen to the blood