What does octadecagon mean?
Octadecagon means (geometry, rare) A polygon with 18 sides and 18 vertices..
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Pronunciation varies by accent · noun
(geometry, rare) A polygon with 18 sides and 18 vertices..
A regular octadecagon cannot be constructed using a compass and straightedge.
Use octadecagon when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Octadecagon means (geometry, rare) A polygon with 18 sides and 18 vertices..
Common synonyms include 18-gon.
The opposite depends on the specific sense.
A regular octadecagon cannot be constructed using a compass and straightedge.
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