What does rhomb mean?
A rhomb is a parallelogram whose four sides all have the same length. Its opposite sides are parallel, its opposite angles are equal, and either diagonal divides the shape into two congruent triangles. The word is chiefly associated with geometry and related technical vocabulary, but it can also describe something formed in a diamond-like outline. In modern usage, however, rhombus is substantially more common and is normally the preferred word for the mathematical shape. Rhomb is related to rhomboid and rhombic, terms used for quadrilaterals or crystalline substances connected with the same geometric idea. Its unusual history also links it to the ancient Greek word for a spinning top or whirling object, because such an object could resemble the shape when set in motion. The word is therefore more than a concise synonym: it preserves an older vocabulary tradition associated with geometry, pattern, and rotation.
nounA rhombus, especially a parallelogram with four equal sides. The term is relatively uncommon; rhombus is the usual modern form.
- A rhombus; a parallelogram with four equal sides.
"The designer drew a tilted rhomb at the center of the emblem."
"The rhomb can be divided along either diagonal to form two congruent triangles."
"A large rhomb appears in the geometric pattern printed on the wrapping paper."
The standard plural is rhombs, though the more common noun rhombus has the plurals rhombuses and rhombi.
"The pattern contains several rhombs arranged around a central circle."
A rhomb takes its name from the Greek word for a spinning top, whose pointed, rotating form resembles a diamond.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does rhomb come from?
The word comes through French and Latin from Greek rhombos, meaning a spinning top or whirling object. The geometric sense developed through the comparison of a rhombus with a top viewed in motion, which suggested a diamond-like outline. English later adopted the shorter form rhomb alongside the more familiar Latin-derived rhombus.
Related word forms
How rhomb is actually used
The word is uncommon in modern English, especially outside technical or traditional contexts. Rhombus is normally preferred when referring to the geometric shape.
Easily confused with rhomb
A rhombus has four equal sides, whereas a rhomboid is a parallelogram whose opposite sides are equal but whose four sides are not all equal.