Added 9 October 2026
icosahedron
/(ˌ)aɪˌkoʊsəˈhiːdɹən/ noun
noun Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about icosahedron at Wordnik → Where our words come from →
- Any polyhedron having twenty plane faces.
Origin
From Ancient Greek εἰκοσάεδρον (eikosáedron), from εἴκοσι (eíkosi, “twenty”) + ἕδρα (hédra, “face of a geometrical solid”). Equivalent to icosa- + -hedron.
From Wiktionary, via Kaikki.org (CC BY-SA)