| 释义 |
heptahedron|-ˈhiːdrən, -ˈhɛdrən|
Also heptaedron.
[f. hepta- + Gr. ἕδρα seat, base.]
A solid figure having seven faces. So heptaˈhedral, † heptaˈhedrical adjs., seven-sided, seven-faced.
1658Phillips, Heptahedrical, having seven sides. 1696Ibid., Heptaedrical Figure, or Heptaedron. 1758Borlase Cornwall ii. §17. 141 A heptahedral cuspis of brass-coloured Mundic. 1804Watt in Phil. Trans. XCIV. 310 note, Hexaedral and pentaedral prisms are most abundant; then the tetraedral, the triedral, heptaedral, and octaedral. |