| the offspring of a zebra and a donkey. |
| an extraordinary or unusual thing, person, or event; an exceptional example or instance. |
alveolus al·ve·o·lus (āl-vē'ə-ləs)
n. pl. al·ve·o·li (-lī')
A small angular cavity or pit, such as a tooth socket or an air sac.
| alveolus (āl-vē'ə-ləs) Pronunciation Key
Plural alveoli (āl-vē'ə-lī') Any of the tiny air-filled sacs arranged in clusters in the lungs, in which the exchange of oxygen and carbon dioxide takes place. Also called air sac. |