icosahedron

1. 1.

   any polyhedron having twenty plane faces

   Broaderpolyhedron

Other forms of icosahedron

plural

icosahedra

Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.

Questions about icosahedron

What does icosahedron mean?

icosahedron means "any polyhedron having twenty plane faces".

How many syllables are in icosahedron?

icosahedron has 5 syllables and divides as i-co-sa-he-dron under the regular spelling rules. It is not in the CMU Pronouncing Dictionary, so that comes from how the word is written rather than from a recorded pronunciation, and no stress or phonetic transcription is claimed for it.