| 释义 |
perforator|ˈpɜːfəreɪtə(r)|
[Agent-noun in L. form, from perforāre to perforate. In mod.F. perforateur (Littré).]
1. An instrument or machine used for perforating.
a. Surgery, (a) a trephine; (b) an instrument for penetrating the fœtal skull. b. A power-machine for drilling rock in order to blast it, in tunnelling, etc. c. A machine for perforating postage-stamps, etc.; also, that used for perforating the paper-ribbons used in some forms of telegraphy.
1739S. Sharp Surgery xiii. 61 Withdrawing the Perforator, leave the Waters to empty by the Canula. 1767Gooch Treat. Wounds I. 245 After making many adjacent holes, with a drill or perforator, as far as the meditullium. 1790R. Bland in Med. Commun. II. 454 We are under the necessity of using the perforator and crotchet. 1822–34Good's Study Med. (ed. 4) IV. 152. 1871 Daily News 18 Sept., At the beginning of December we heard quite clearly the blows of the perforators against the rocks. 1876Preece & Sivewright Telegraphy §119 The [Wheatstone] apparatus consists of three parts: the perforator, which prepares the message by punching holes in a paper ribbon; the transmitter..and the receiver. 1900Daily News 13 Oct. 6/3 When the perforators have bored a hole some three feet deep, it is filled with dynamite and fired.
2. A boring organ possessed by some insects, variously used as a sting, an ovipositor, etc.
1828Stark Elem. Nat. Hist. II. 335 Tenthredo... Perforator not projecting beyond the anus. Ibid. 336 Some have the last half segment of the abdomen prolonged into a point, with a projecting perforator of three filaments. |