| 释义 |
pentahedral, a.|pɛntəˈhiːdrəl, -ˈhɛdrəl|
Also pentaedral.
[f. penta- + Gr. ἕδρα seat, base + -al1: cf. hexahedral.]
Of a solid figure or body: Having five faces; esp. having five lateral faces, five-sided (as a prism of pentagonal section). So † pentaˈhedrical, pentaˈhedrous adjs. in same sense; pentaˈhedron, a solid figure having five faces.
1804Watt in Phil. Trans. XCIV. 310 note, Hexaedral and *pentaedral prisms are most abundant; then the tetraedral, the triedral, heptaedral, and octaedral. 1826Kirby & Sp. Entomol. IV. 266 Pentaedral, that hath five sides.
1658Phillips, *Pentahedrical figure,..a figure which hath five sides. 1661in Blount Glossogr.
1775Ash, *Pentahedron (a different spelling), the pentaedron. Ibid., Pentaedron, a pillar with five sides.
a1728Woodward Fossils (1729) I. 120 The *pentaedrous Columnar Coralloid Bodies are compos'd of Plates set lengthways. |