Dictionary
gra•num
Pronunciation: (grā'num), [key]—
n.,
—pl. -naPronunciation: (-nu). [key]
1. (in prescriptions) a grain.
2. Bot.one of the structural units of a chloroplast in vascular plants, consisting of layers of thylakoids.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.