astroid

[ as-troid ]
/ ˈæs trɔɪd /

noun Geometry.

a hypocycloid with four cusps.

Origin of astroid

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for astroid

astroid
/ (ˈæstrɔɪd) /

noun

maths a hypocycloid having four cusps

Word Origin for astroid

C19: from astro- + -oid
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