The story
From triangular + hebe- (“blunt”) + spheno- + rotunda. Coined by Norman W. Johnson in 1969.
Etymology from Wiktionary, CC BY-SA 4.0.
triangular hebesphenorotunda
Today it means: A polyhedron, one of the Johnson solids, whose faces are composed of 13 triangles, 3 squares, 3 pentagons, and 1 hexagon. Full definition →