Word.ws English Dictionary

Theaetetus

Theaetetus proper noun: a classical Greek mathematician credited with proving that there are precisely five regular convex polyhedra.

Proper noun

Theaetetus

  1. A classical Greek mathematician credited with proving that there are precisely five regular convex polyhedra.
  2. A later middle dialogue of Plato concerning epistemology.
  3. A lunar impact crater 2.8 kilometres in depth and 25 kilometres in diameter, located southeast of the crater Cassini, near the eastern edge of Mare Imbrium.

Origin of Theaetetus

From Ancient Greek Θεαίτητος (Theaítētos); the mathematician is the eponym of the dialogue and the lunar crater.

Questions about Theaetetus

What does Theaetetus mean?
Theaetetus means a classical Greek mathematician credited with proving that there are precisely five regular convex polyhedra.
What part of speech is Theaetetus?
Theaetetus is a proper noun.

Words near Theaetetus in the dictionary

  1. the-
  2. the-rapist
  3. Thea
  4. theaceous
  5. Theadore
  6. Theaetetus
  7. theaflavin
  8. theaflavins
  9. Theagenes
  10. theah
  11. theaism

Source and license

Adapted from Wiktionary: Theaetetus (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: “Theaetetus.” Word.ws, https://word.ws/theaetetus. Based on Wiktionary, CC BY-SA 4.0.