Dictionary
men•a•di•one
Pronunciation: (men"u-dī'ōn), [key]—
n. Pharm.
a synthetic yellow crystalline powder, C
11H
8O
2, insoluble in water, used as a vitamin K supplement. Also called
vitamin K3. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.