| 释义 |
striation|straɪˈeɪʃən|
[n. of action f. striate v.: see -ation.]
1. Striated condition or appearance.
1851Ruskin Stones Ven. (1874) I. viii. 94 Longitudinal furrowing or striation on the original single shaft. 1866Huxley Physiol. xii. (1872) 291 This contractile substance..presents a..transverse striation. 1877M. Foster Physiol. i. ii. (1878) 81 Striation is characteristic of muscles whose contraction is rapid. 1883Chamberlin in 3rd Ann. Rep. U.S. Geol. Surv. 318 Glacial movements... Striation. 1914Conan Doyle Capt. Pole Star 40 This weapon is said to exhibit a longitudinal striation on the steel.
2. a. One of a set or system of striæ, a streak, a marking; esp. Geol. one of the grooves or glacial marks found on rock-surfaces; Min. (pl.) the fine parallel lines on a crystalline face.
1849Dana Geol. App. i. (1850) 710 A fragment from Harper's Hill contains 25 to 27 striations in half an inch. 1888P. L. Sclater Argentine Ornith. I. 97 Agelæus thilius... Beneath paler, cineraceous white with black striations.
b. Electr. = stria 2 d (in sing.).
1902Encycl. Brit. XXVIII. 47/2 The bright parts of the striations are slightly concave to the positive electrode. 1942J. D. Stranathan ‘Particles’ Mod. Physics iii. 67 As the pressure is still further reduced..the striations become more coarse and indistinct, and the Crookes dark space lengthens. 1973[see striated ppl. a. 1 e]. |