| 释义 |
conchoidal, a.|kɒŋˈkɔɪdəl|
[f. as prec. + -al1.]
1. Geom. Pertaining to, or resembling, a conchoid.
1666Collins in Rigaud Corr. Sci. Men (1841) II. 469 Let there be points made in a curve, which will be conchoidal or asymptotic. 1879G. Salmon Higher Plane Curves v. 172 The serpentine is exchanged for the conchoidal form.
2. Min., etc. Applied to a fracture presenting smooth shell-like convexities and concavities.
1802Playfair Illustr. Hutton. Th. 287 Their fracture was conchoidal and but slightly uneven. 1865Lubbock Preh. Times iv. (1869) 78 A splintery conchoidal fracture almost as sharp as that of flint. |