rhombus

[rom-buh s]

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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

Related Words for rhombus

jewel, gem, rhinestone, square, rectangle, parallelogram, quadrilateral, rhombus, paragon, ice, lozenge, rock, zircon, corundum, allotrope, solitaire, brilliant, bort, jager

Examples from the Web for rhombus

Historical Examples of rhombus

And a Rhomboides is so opposed to an oblong, as a Rhombus is to a quadrate.
The Way To Geometry
Peter Ramus
The Rhombus cardina, a passable fish of the pleuronect genus.
The Sailor's Word-Book
William Henry Smyth
What is it about the rhombus, pa, and when am I to read Juvenal?
Cradock Nowell, Vol. 2 (of 3)
Richard Doddridge Blackmore
We use "parallelogram" to cover "rhomboid," "rhombus," "oblong," and "square."
The Teaching of Geometry
David Eugene Smith
The Rhombus maximus (Cuvier), said to be the best, and excepting the halibut, the largest of our flat fishes.
Cooley's Practical Receipts, Volume II
Arnold Cooley

British Dictionary definitions for rhombus

rhombus

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

Word Origin and History for rhombus

1560s, from Late Latin rhombus, from Greek rhombos "rhombus, rhomb, lozenge; spinning top, maghic wheel used by sorcerers; a spinning motion," from rhembesthai "to spin, whirl," from PIE *wrembh-, from *werbh- "to turn, twist, bend" (cf. Old English weorpan "to throw away"), from root *wer- (3) "to turn, bend" (see versus).

rhombus in Science

rhombus

[rŏm′bəs]

Plural rhombuses rhombi (rŏm′bī)

A parallelogram with four equal sides; an equilateral parallelogram.

Related formsrhomboid, rhomboidal adjective