an oblique-angled parallelogram having four equal sides
Also called: rhomb
Comparesquare 1
WordReference Random House Learner's Dictionary of American English © 2026
rhom•bus /ˈrɑmbəs/USA pronunciation
n. [countable], pl. -bus•es, -bi /-baɪ/.USA pronunciation
WordReference Random House Unabridged Dictionary of American English © 2026- Mathematicsa four-sided figure with all four sides parallel and equal in length but with oblique angles.
rhom•bus
(rom′bəs),USA pronunciation n., pl. -bus•es, -bi (-bī).USA pronunciation
- Mathematicsan oblique-angled equilateral parallelogram;
any equilateral parallelogram except a square. - Mathematicsan equilateral parallelogram, including the square as a special case.
- Mathematicsa rhombohedron.
- Greek rhómbos anything that may be spun around, derivative of rhémbein to revolve
- Latin
- 1560–70
Collins Concise English Dictionary © HarperCollins Publishers::
'rhombus' also found in these entries (note: many are not synonyms or translations):
brill
- diamond
- lozenge
- parallelogram
- rectangle
- rhomb
- rhombencephalon
- rhombic
- rhombic aerial
- rhombohedron
- rhomboid
- rhumb
- rhumb line
- square