noun, plural hep·ta·he·drons, hep·ta·he·dra [hep-tuh–hee-druh] /ˌhɛp təˈhi drə/.
- a solid figure having seven faces.
noun
- a solid figure having seven plane facesSee also polyhedron
noun, plural hep·ta·he·drons, hep·ta·he·dra [hep-tuh–hee-druh] /ˌhɛp təˈhi drə/.
noun