Rhombus vs. Trapezium — What's the Difference?

In plane Euclidean geometry, a rhombus (plural rhombi or rhombuses) is a quadrilateral whose four sides all have the same length. Another name is equilateral quadrilateral, since equilateral means that all of its sides are equal in length.

A quadrilateral having no parallel sides.

A quadrilateral all of whose sides have the same length.

Chiefly British A trapezoid.

An equilateral parallelogram, especially one having oblique angles. Also called rhomb.

(Anatomy)A bone in the wrist at the base of the thumb.

(geometry) A parallelogram having all sides of equal length.

A quadrilateral with two sides parallel.

The rhombus diamond, as one of the suits seen in a deck of playing cards (♦ or ♦).

(restrictively) A quadrilateral with two sides parallel and two sides non-parallel.

In early Greek religion, an instrument whirled on the end of a string similar to a bullroarer.

A four-sided polygon with no parallel sides and no sides equal; a simple convex irregular quadrilateral.

Any of several flatfishes, including the brill and turbot, once considered part of the genus Rhombus, now in Scophthalmus.

(anatomy) The trapezium bone of the wrist.

Snails, now in genus Conus or family Conidae.

A region on the ventral side of the brain, either just back of the pons Varolii, or, as in man, covered by the posterior extension of its transverse fibers.

Same as Rhomb, 1.

A plane figure bounded by four right lines, of which no two are parallel.

A parallelogram with four equal sides; an oblique-angled equilateral parallelogram

A bone of the carpus at the base of the first metacarpal, or thumb.

A quadrilateral with no parallel sides

A multiple star in the constellation of Orion

The wrist bone on the thumb side of the hand that articulates with the 1st and 2nd metacarpals