Dictionary
pen•to•bar•bi•tal
Pronunciation: (pen"tu-bär'bi-tôl", -tal"), [key]—
n. Pharm.
a barbiturate, C
11H
17N
2O
3, used as a hypnotic and as a sedative.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.