| 单词 | heptahedron |
| 释义 | heptahedron —heptahedral, heptahedrical, adj. /hep'teuh hee"dreuhn/, n. , pl. heptahedrons, heptahedra /-dreuh/. a solid figure having seven faces. [1650-60; HEPTA- + -HEDRON] |
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