Triangulum
noun
Tri·an·gu·lum
| \ trī-ˈaŋ-gyə-ləm
\
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Definition of Triangulum
astronomy
: 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
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