rhombus: meaning, definition, pronunciation and examples
C2Formal, Academic, Technical
Quick answer
What does “rhombus” mean?
A flat shape with four equal straight sides, like a square pushed over to one side.
Audio
Pronunciation
Definition
Meaning and Definition
A flat shape with four equal straight sides, like a square pushed over to one side; a parallelogram with equal sides and opposite equal acute and obtuse angles.
In a broader sense, any rhombus-shaped object or design. In some contexts, informally used to refer to a diamond shape (e.g., in playing cards).
Dialectal Variation
British vs American Usage
Differences
No significant semantic differences. Pronunciation differs (see IPA).
Connotations
Technical/geometric in both varieties.
Frequency
Equally low-frequency in everyday speech for both, primarily used in academic/technical contexts.
Grammar
How to Use “rhombus” in a Sentence
The [noun] is a rhombus.A rhombus has [property].The [object] formed a rhombus.Vocabulary
Collocations
Examples
Examples of “rhombus” in a Sentence
adjective
British English
- The rhombus tessellation was striking.
- It had a rhombus-like appearance.
American English
- The rhombic pattern covered the floor.
- He drew a rhombus-shaped figure.
Usage
Meaning in Context
Business
Rare, except in design or branding discussing logo shapes (e.g., 'Our logo features a stylised rhombus.').
Academic
Common in mathematics, geometry, and crystallography to describe specific shapes and structures.
Everyday
Very rare. A non-specialist might say 'diamond shape' instead.
Technical
Precise term in geometry, engineering, and material science.
Watch out
Common Mistakes When Using “rhombus”
- Confusing a rhombus with a general diamond/kite shape which may not have all sides equal.
- Pronouncing it as 'rom-BUS' (stress on second syllable).
- Using it in everyday conversation where 'diamond' would be more natural.
FAQ
Frequently Asked Questions
Yes. A square is a special case of a rhombus where all interior angles are right angles.
In geometry, 'rhombus' is the precise term. 'Diamond' is a lay term often based on appearance (like a playing card suit) and can sometimes refer to shapes that are not strictly rhombuses (e.g., kites).
The area can be calculated as half the product of its diagonals (Area = (d1 * d2)/2) or as base times height.
It is used in specific technical fields like engineering, crystallography, and design, but is very rare in general everyday conversation.
A flat shape with four equal straight sides, like a square pushed over to one side.
Rhombus is usually formal, academic, technical in register.
Rhombus: in British English it is pronounced /ˈrɒmbəs/, and in American English it is pronounced /ˈrɑːmbəs/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “No common idioms feature 'rhombus'.”
Learning
Memory Aids
Mnemonic
Think of a 'rhino' (sounds like 'rhom') butting a square, pushing it over to make a slanted, equal-sided shape – a rhombus.
Conceptual Metaphor
STABILITY THROUGH SYMMETRY (despite being tilted, its equal sides and parallel opposites maintain structural balance).
Practice
Quiz
Which of the following is a defining property of a rhombus?