rhombus
/'rɔmbəs/
Definition
- Noun:
- A flat shape with four straight sides of equal length, where opposite sides are parallel and opposite angles are equal: A rhombus is a specific type of quadrilateral. It is an equilateral parallelogram, meaning all four sides are congruent, but its angles are not necessarily 90 degrees.
Examples of Usage
- Noun:
- A square is a special type of rhombus where all angles are right angles.
- The kite's frame was in the shape of a rhombus.
- She drew a rhombus on the whiteboard to explain the geometric concept.
Advanced Usage
- Mathematical Context: In geometry, a rhombus (plural: rhombi or rhombuses) has diagonals that bisect each other at right angles.
- The diagonals of a rhombus are perpendicular bisectors of each other.
Variants and Related Words
- Rhomboid (noun): A parallelogram in which adjacent sides are unequal and angles are oblique (not right angles). It is a more general term than rhombus.
- A rhombus is a special case of a rhomboid where all sides are equal.
- Rhombic (adjective): Having the shape or characteristics of a rhombus.
- The crystal had a distinct rhombic structure.
Synonyms
- Equilateral quadrilateral: A four-sided polygon with all sides equal in length.
- Diamond (in informal or specific contexts): A rhombus shape, often used when referring to the suit in playing cards or in a general sense. (Note: In strict geometry, "diamond" is not a formal term.)
Related Phrases and Idioms
(This word is a specific geometric term and is not commonly used in idiomatic expressions or phrasal verbs.)
Noun
-
a parallelogram with four equal sides; an oblique-angled equilateral parallelogram
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