| -hedron | |
| —n combining form | |
| indicating a geometric solid having a specified number of faces or surfaces: tetrahedron | |
| [from Greek -edron -sided, from hedra seat, base] | |
| -hedral | |
| —adj combining form | |
| a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes. |
| a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question. |