Dictionary
om•ma•tid•i•um
Pronunciation: (om"u-tid'ē-um), [key]—
n.,
—pl. -tid•i•aPronunciation: (-tid'ē-u). [key]
Zool.
one of the radial elements composing a compound eye.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.