English
hexatetrahedron
From hexa- + tetrahedron.
Formed from hexa- + tetrahedron
Ancient Greek τετράεδρος ‘having four faces, tetrahedral’
Ancient Greek τετράεδρον ‘triangle-based pyramid’
English tetrahedron
Today it means
noun A cube truncated by two tetrahedra
Language periods are conventional ranges, not dates for this word.
Etymograph / hexatetrahedron