Triangulum[trī aŋ′gyə ləm]
Triangulum definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
a N constellation between Aries and Andromeda
Triangulum definition by American Heritage Dictionary
A constellation in the northern sky near Aries and Andromeda.
Origin: Latin triangulum, triangle; see triangle.