Tri·​an·​gu·​lum trī-ˈaŋ-gyə-ləm How to pronounce Triangulum (audio)
: a small northern constellation that is visible between the constellations of Andromeda and Aries and that is represented by the figure of an isosceles triangle
Triangulum: A small constellation, its name comes from its three brightest stars, which form a long and narrow triangle.Graham Henry, South Wales Echo, 20 Jan. 2012

Word History

First Known Use

1695, in the meaning defined above

Time Traveler
The first known use of Triangulum was in 1695

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Cite this Entry

“Triangulum.” Dictionary, Merriam-Webster, Accessed 29 Nov. 2023.

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