Word.ws English Dictionary

pentagonous

pentagonous is the obsolete form of pentagonal.

Meaning of pentagonal

Adjective

pentagonal (comparative more pentagonal, superlative most pentagonal)

  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 : ...1850, John Radford Young, An introductory treatise on mensuration, in theory and practice, page 115

See all 2 meanings of pentagonal

Forms of pentagonous

comparativemore pentagonous
superlativemost pentagonous

Origin of pentagonous

From pentagon + -ous.

Questions about pentagonous

What is pentagonous the obsolete form of?
Pentagonous is the obsolete form of pentagonal.

Words near pentagonous in the dictionary

  1. pentagonist
  2. pentagonite
  3. pentagonohedron
  4. pentagonohedrons
  5. pentagonoid
  6. pentagonous
  7. pentagons
  8. pentagram
  9. pentagrammatic
  10. pentagramme
  11. pentagrammes

Source and license

Adapted from Wiktionary: pentagonous (page history and authors); pentagonal (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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Cite this entry: “pentagonous.” Word.ws, https://word.ws/pentagonous. Based on Wiktionary, CC BY-SA 4.0.