Dictionary.com
definitions

Triangulum

[trahy-ang-gyuh-luh m]
noun, genitive Tri·an·gu·li [trahy-ang-gyuh-lahy] /traɪˈæŋ gyəˌlaɪ/. Astronomy.
  1. the Triangle, a northern constellation between Pisces and Perseus.

Origin of Triangulum

Borrowed into English from New Latin around 1545–55
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for triangulum

Historical Examples of triangulum

  • The Andromeda Nebula is apparently less advanced toward transformation into stellar bodies than is that in Triangulum.

    Curiosities of the Sky

    Garrett Serviss

  • Triangulum and Aries are two rather inconspicuous constellations that lie on, or close to, the meridian at this time.

    Astronomy for Young Folks

    Isabel Martin Lewis

  • Triangulum is a very ancient constellation, being formerly named Deltoton, from the Greek letter Delta Δ.

    A Field Book of the Stars

    William Tyler Olcott

British Dictionary definitions for triangulum

Triangulum

noun Latin genitive Trianguli (traɪˈæŋɡjʊˌlaɪ)
  1. a small triangular constellation in the N hemisphere, close to Perseus and Aries
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012