- 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
Examples from the Web for rhombus
And a Rhomboides is so opposed to an oblong, as a Rhombus is to a quadrate.The Way To Geometry
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
- an oblique-angled parallelogram having four equal sidesAlso called: rhomb Compare square (def. 1)
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).
- A parallelogram with four equal sides; an equilateral parallelogram.