Word Study
heptahedron
CIDE DICTIONARY
heptahedron, n. [Hepta- + Gr. seat, base, fr. to sit: cf. F. heptaèdre.].
A solid figure with seven sides. [1913 Webster]
OXFORD DICTIONARY
heptahedron, n. a solid figure with seven faces.
Derivative
heptahedral adj.
Etymology
HEPTA- + -HEDRON after POLYHEDRON
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