Ĕn'ne-a-cŏn'ta-hē'dral, a.

[Gr. ἐννενήκοντα, ἐνενήκοντα, ninety, and ἕδρα, seat, base, from ἕδος, seat, from ἕζεσθαι, to sit; Fr. ennéacontaèdre.] Having ninety faces or sides; — said of a crystal or other solid figure bounded by planes.