Polyhedron

//ˌpɑliˈhidɹən// noun

noun ·Moderate ·College level

Definitions

Noun
  1. 1
    A solid figure with many flat faces and straight edges.

    "Of the convex polyhedra with regular faces, the only ones that have tetrahedral, octahedral, or icosahedral symmetry are the Platonic and Archimedean solids."

  2. 2
    a solid figure bounded by plane polygons or faces wordnet
  3. 3
    A polyscope, or multiplying glass.
  4. 4
    A stage in the growth of Hydrodictyon, when the resting spore breaks up into several megazoospores that put out horn-like appendages; these polyhedra break up into zoospores.

Synonyms

All synonyms
figuretriangle

Example

More examples

"Each face of a polyhedron is a polygon."

Etymology

From New Latin polyedron, from Ancient Greek πολύεδρος (polúedros, “having many seats”), from πολυ- (polu-, “many”) + ἕδρα (hédra, “seat”); compare French polyèdre. By surface analysis, poly- + -hedron.

Related phrases

Euler's polyhedron formulaJohnson polyhedronSchönhardt polyhedronideal polyhedronschläfli symbolspherical polyhedron

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