Pentagonal

//pɛnˈtæɡənəl// adj, noun

adj, noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    Something having the shape of a pentagon.

    "Speaking of protection, note that not only are the end pentagonals surrounded by a generous air space, but the entire instrument is insulated, […]"

Adjective
  1. 1
    Of, relating to, or shaped like a pentagon.

    "If the base be a triangle, it is called a triangular prism; if a square, a square prism; if a pentagon, a pentagonal prism; and' if the base is any irregular figure, it is called an irregular prism : ..."

Adjective
  1. 1
    of or relating to or shaped like a pentagon wordnet

Synonyms

All synonyms
octagonalpentangularpentangular

Example

More examples

"How many vertices and faces does a pentagonal prism have?"

Etymology

From pentagon + -al.

Related phrases

pentagonal prism

More for "pentagonal"

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