enneagon: meaning, definition, pronunciation and examples
RareFormal, Technical
Quick answer
What does “enneagon” mean?
A polygon with nine sides and nine angles.
Audio
Pronunciation
Definition
Meaning and Definition
A polygon with nine sides and nine angles.
In geometry, a specific type of nonagon; occasionally used more broadly in symbolic contexts to represent the number nine.
Dialectal Variation
British vs American Usage
Differences
Both 'nonagon' and 'enneagon' are understood, but 'nonagon' is overwhelmingly dominant in both regions for mathematical use.
Connotations
No regional connotations.
Frequency
Extremely low frequency in both regions; 'nonagon' is far more common.
Grammar
How to Use “enneagon” in a Sentence
The [adjective] enneagon has nine sides.An enneagon is a [adjective] polygon.Vocabulary
Collocations
Examples
Examples of “enneagon” in a Sentence
verb
British English
- No common verb form.
American English
- No common verb form.
adverb
British English
- No common adverb form.
American English
- No common adverb form.
adjective
British English
- The enneagonal shape was precisely drawn.
- An enneagonal figure.
American English
- The enneagonal structure was complex.
- An enneagonal pattern.
Usage
Meaning in Context
Business
Virtually never used.
Academic
Used almost exclusively in geometry or mathematics textbooks/historical texts.
Everyday
Very unlikely to be used; 'nonagon' is the everyday term.
Technical
Used in technical mathematical or geometric writing, though 'nonagon' is standard.
Vocabulary
Synonyms of “enneagon”
Vocabulary
Antonyms of “enneagon”
Watch out
Common Mistakes When Using “enneagon”
- Spelling: 'eneagon', 'ennegan'.
- Pronunciation: /ɛˈniːəɡɒn/ (incorrect stress).
- Confusing it with 'hexagon' or 'octagon'.
FAQ
Frequently Asked Questions
There is no geometric difference; they are synonyms. 'Nonagon' (Latin-based) is the standard modern term. 'Enneagon' (Greek-based) is rarer and sometimes used in specific contexts.
The standard pronunciation is /ˈɛn.i.ə.ɡɒn/ (UK) or /ˈɛn.i.ə.ɡɑːn/ (US), with the stress on the first syllable: EN-ee-uh-gon.
No, it is a rare word. In almost all mathematical, educational, and everyday contexts, 'nonagon' is used instead.
No, a regular enneagon cannot tessellate a plane by itself because its interior angle (140 degrees) does not divide evenly into 360 degrees.
A polygon with nine sides and nine angles.
Enneagon is usually formal, technical in register.
Phrases
Idioms & Phrases
- “No common idioms”
Learning
Memory Aids
Mnemonic
Think 'ENNEA' (Greek for nine) + 'GON' (angle/side).
Conceptual Metaphor
Complexity or completeness (due to the number nine).
Practice
Quiz
Which term is a synonym for 'enneagon'?