triskaidecahedron means synonym of tridecahedron. Lexicurio rates it Rare gem — a strength score of 82 out of 100.
Etymology
From triskaideca- + -hedron.
noun
- Synonym of tridecahedron.“From the various dodecahedrons may be derived seven triskaidecahedrons, and from these in turn may be derived seven tetrakaidecahedrons.”