| 单词 | chatter-mark |
| 释义 | > as lemmaschatter-mark chatter-mark n. (a) Geology a mark made on a surface by a fragment of rock on the under-surface of glacier ice; (b) (see quot. 1893). ΘΚΠ the world > the earth > structure of the earth > structural features > mark on feature or surface > [noun] seamc1330 footprint1552 stringa1728 wrinklea1807 ripple mark1831 ripple1838 grooving1846 wave-mark1863 sand-scratch1871 chatter-mark1888 cross-colouring1901 wave-marking1903 society > occupation and work > equipment > machine tool > [noun] > vibration of > marks caused by utters1853 chatter-mark1888 chatter1893 1888 T. C. Chamberlin in 7th Ann. Rep. U.S. Geol. Surv. 1885–6 247 A fragment of rock acting as a gouging tool often produces ‘chatter marks’, little transverse lines of breakage due to the unsteady action of the tool in gouging the rock. 1893 I. K. Funk et al. Standard Dict. Eng. Lang. I Chatter-marks, irregular tool-markings caused by vibration due to lack of stiffness in a lathe or similar machine. 1904 T. C. Chamberlin & R. D. Salisbury Geol. (1905) I. 270 Glacial striæ and bruises. The block to the right shows two sets of striæ: that to the left shows the peculiar curved fractures known as Chatter Marks. 1954 H. Garner Oriental Blue & White 37 They are roughly finished with radial marks, caused by the slipping of the turning tool and colloqually known as ‘chatter marks’. 1963 D. W. Humphries & E. E. Humphries tr. H. Termier & G. Termier Erosion & Sedimentation v. 124 (caption) Striation left by the Quaternary Ice Sheet on a Rock in Fakse Quarry (Denmark). Note the lunate ‘chatter marks’; the ice moved from left to right. < as lemmas |
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