| 释义 |
tetrahedroid, a. and n.|tɛtrəˈhiːdrɔɪd, -ˈhɛdrɔɪd|
[f. as prec. + -oid.]
a. adj. Resembling or approaching the form of a tetrahedron.
b. n. Geom. The envelope of a quadric surface which touches eight given straight lines.
1889Cayley's Math. Papers I. 587 note, The surface here considered, the Tetrahedroid, is the general homographic transformation of the wave surface. 1899Geog. Jrnl. Mar. 251 Causes, which..would go in the direction of producing tetrahedral, or tetrahedroid, deformation. |