from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A constellation in the northern sky near Aries and Andromeda.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • proper n. An autumn constellation of the northern sky whose brightest three stars form a small triangle. The constellation lies near Perseus, between Aries and Andromeda.
  • proper n. The Triangulum Galaxy, a relatively nearby spiral galaxy to the Milky Way; M33.

from The Century Dictionary and Cyclopedia

  • n. An ancient northern constellation in the form of the letter delta (δ). It has one star of the third magnitude.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. a small northern constellation near Perseus between Andromeda and Aries


Latin triangulum, triangle; see triangle.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From Latin triangulum, a "triangle" (Wiktionary)



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