| 释义 |
wedging, vbl. n.|ˈwɛdʒɪŋ|
[f. wedge v.1 and n. + -ing1.]
1. a. The action of driving in a wedge or wedges, or of fixing or cleaving by this means; the condition of being thus fixed.
1678Moxon Mech. Exerc. v. 98 They drive a Wedge so far in the kerf as they dare..and so provide the Saw a freer and easier passage through the Stuff: This Wedging they continue so oft as they find occasion. 1825,1842Foxtail wedging [see foxtail 4]. 1893Tuckey tr. Hatschek's Amphioxus 140 We saw the oval notochord transverse section still wedged in between the cells of the mesenteron... In the region of the later segments we still find the former condition of the wedging.
b. concr. A wedge-shaped piece or pieces of some hard material driven in for tightening or securing.
1825J. Nicholson Oper. Mech. 337 The wheels are fixed on the shaft by means of a wedging of hard wood, driven in all round.
2. Geol. The flaking off (of rock, etc.), as if by the operation of a wedge.
1882A. Geikie Text-bk. Geol. vii. 928 Their naked precipices are kept bare and steep by the wedging off of successive slices of rock along lines of joint.
3. Sport. (See quot.)
1897Encycl. Sport I. 583 Spraint, the excrement of the otter; also called wedging.
4. Geol. With out: the narrowing of a stratum or the like to the point of extinction. Cf. wedge v.1 6.
1819J. Forbes Geol. Land's-End District (1822) 21 At one point of this natural section, an instructive example of what is called by geologists the wedging out of a bed, is observable. 1883W. S. Gresley Gloss. Coal-Mining 283 Wedging out, cropping or thinning out.
5. attrib., as wedging joint; wedging crib, curb Mining (see crib n. 12 and curb n. 10).
1839Ure Dict. Art 972 Three kinds of cribs are employed; called wedging, spiking, and main cribs. Ibid. 973 The flange for the wedging joint is best turned inwards. 1881Raymond Mining Gloss., Wedging-curb or Wedging-crib, Eng. |
