Dictionary
fre•num
Pronunciation: (frē'num), [key]—
n.,
—pl. -naPronunciation: (-nu). [key]
Anat., Zool.
a fold of membrane that checks or restrains the motion of a part, as the fold on the underside of the tongue.
Also,fraenum.Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.