Where does “tetrahedron” come from?
Tetrahedron comes from Ancient Greek τετράεδρον, combining τετρα- (four, from τέτρα derived from Proto-Indo-European kʷetwóres) and ἕδρα (seat or face, from Proto-Indo-European sed-, to sit).
tetrahedron (English): A polyhedron with four faces; the regular...
Definitions
- A polyhedron with four faces; the regular...
Ancestry of “tetrahedron”, step by step
| Step | Language | Word | Meaning |
|---|---|---|---|
| 1 | Ancient Greek | τετράεδρον | triangle-based pyramid |
| 2 | Ancient Greek | τετράεδρος | having four faces, tetrahedral |
| 3 | Ancient Greek | -ός | Forms agentive or patientive adjectives and nouns from the o-grade of a verbal root |
| 4 | Proto-Hellenic | *-os | — |
| 5 | Proto-Indo-European | -ós | Creates agent nouns from verb stems, denoting... |