Dictionary.com

pentadecagon

[ pen-tuh-dek-uh-gon, -guhn ]
/ ˌpɛn təˈdɛk əˌgɒn, -gən /
Save This Word!

noun Geometry.
a polygon having 15 angles and 15 sides.
QUIZ
GOOSES. GEESES. I WANT THIS QUIZ ON PLURAL NOUNS!
Test how much you really know about regular and irregular plural nouns with this quiz.
Question 1 of 9
Which of the following nouns has an irregular plural form?

Origin of pentadecagon

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022
FEEDBACK