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rhombus

American  
[rom-buhs] / ˈrɒm bəs /

noun

plural

rhombuses, rhombi

  1. an oblique-angled equilateral parallelogram; any equilateral parallelogram except a square.

  2. an equilateral parallelogram, including the square as a special case.

  3. a rhombohedron.

rhombus British  
/ ˈrɒmbəs /

noun

  1. Also called: rhomb.  an oblique-angled parallelogram having four equal sides Compare square

"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
rhombus Scientific  
/ rŏm′bəs /

plural

rhombuses

  1. A parallelogram with four equal sides; an equilateral parallelogram.

Etymology

Origin of rhombus

First recorded in 1560–70; from Latin, from Greek rhómbos “anything that may be spun around,” derivative of rhémbein “to revolve”

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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.