Pentadecagon

//ˌpɛntəˈdɛkəɡən// noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    A polygon with fifteen sides.

    "In ⊙ O, draw chord AB equal to r. Draw chord AC equal to Vt (which is the side of a regular decagon). CB is now one side of the regular pentadecagon."

Synonyms

All synonyms
15-gonpentakaidecagonquindecagon

Example

More examples

"In ⊙ O, draw chord AB equal to r. Draw chord AC equal to Vt (which is the side of a regular decagon). CB is now one side of the regular pentadecagon."

Etymology

From pentadeca- + -gon.

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.