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octadecagon

Noun CEFR C1

Definitions

A polygon with 18 sides and 18 vertices.

rare

Equivalents

Españoloctodecágono
Françaisoctadécagone
DeutschAchtzehneck
10 more languages

Examples

“A regular octadecagon cannot be constructed using a compass and straightedge.”

CEFR level

C1
Advanced
This word is part of the CEFR C1 vocabulary — advanced level.
See all C1 English words →

See also

octadecahedron octadecahydrate octadecamer octadecanal octadecanamide octadecane

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