Dictionary
tri•lith•on
Pronunciation: (trī-lith'on, trī'lu-thon'), [key]—
n.
a prehistoric structure consisting of two upright stones supporting a horizontal stone.
Also,tri•lithPronunciation: (trī'lith). [key]Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.