rhombus

[ rom-buh s ]
/ ˈrɒm bəs /

noun, plural rhom·bus·es, rhom·bi [rom-bahy] /ˈrɒm baɪ/.

an oblique-angled equilateral parallelogram; any equilateral parallelogram except a square.
an equilateral parallelogram, including the square as a special case.
a rhombohedron.

Origin of rhombus

1560–70; < Latin < Greek rhómbos anything that may be spun around, derivative of rhémbein to revolve
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for rhombus

British Dictionary definitions for rhombus

rhombus

/ (ˈrɒmbəs) /

noun plural -buses or -bi (-baɪ)

an oblique-angled parallelogram having four equal sidesAlso called: rhomb Compare square (def. 1)

Word Origin for rhombus

C16: from Greek rhombos something that spins; related to rhembein to whirl
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

Science definitions for rhombus

rhombus

[ rŏmbəs ]

Plural rhombuses rhombi (rŏm)

A parallelogram with four equal sides; an equilateral parallelogram.

Related forms

rhomboid, rhomboidal adjective
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.