rhombus

noun
UK /ˈrɒm.bəs/
US /ˈrɑːm.bəs/

A rhombus is a flat shape with four equal sides that looks like a tilted square.

The kite was shaped like a rhombus.


OTHER MEANINGS

2. In geometry, a parallelogram with all four sides equal but angles that are not right angles.

A square is a special kind of rhombus with right angles.

3. A diamond-shaped crystal or gemstone cut.

The pendant held a small rhombus of quartz.

4. A diamond-shaped marking or pattern, such as on fabric or a playing card.

The sweater had a red rhombus pattern across the chest.