Dictionary
an•i•mal•cule
Pronunciation: (an"u-mal'kyOOl), [key]—
n.
1. a minute or microscopic animal, nearly or quite invisible to the naked eye, as an infusorian or rotifer.
2. Archaic.a tiny animal, as a mouse or fly.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.