- Rhombus is a parallelogram with four equal sides.
A square is an example of a rhombus.
nounpl. rhombuses or rhombi
Origin of rhombusClassical Latin ; from Classical Greek rhombos, object that can be turned, akin to rhembein, to turn, whirl ; from Indo-European an unverified form wremb- ; from base an unverified form wer-, to turn, bend from source worm, warp
nounpl. rhom·bus·es or rhom·bi
Origin of rhombusLate Latin, from Latin, flatfish, magician's circle, from Greek rhombos, rhombus; see wer-2 in Indo-European roots.
(plural rhombi or rhombuses)
- (zoology, now rare) Any of several flatfishes once considered part of the genus Rhombus. [from 16th c.]
- (geometry) A parallelogram having all sides of equal length. [from 16th c.]
From Latin rhombus, from Ancient Greek ῥόμβος (rhombos, “rhombus, spinning top”), from ῥέμβω (rhembo, “I turn around”).