| 释义 |
▪ I. sheathing, vbl. n.|ˈʃiːθɪŋ, ˈʃiːðɪŋ|
Also 5 schedynge, 7 shething.
[f. sheathe v. + -ing1.]
1. a. The action of putting into a sheath.
1499Promp. Parv. 444/2 (Pynson) Schedynge, vaginatio. 1596[see sheathe v. 1].
b. The action of putting on a protective layer to a ship's bottom; also, † the method or manner in which this is done.
1623in Foster Eng. Factories Ind. (1908) II. 310 Dockes for the sheathinge or carreeninge of theire shipps. a1642Sir W. Monson Naval Tracts iii. (1704) 346/2 Another Sheathing is with double Planks. 1676J. Wood Jrnl. in Acc. Sev. Late Voy. i. (1694) 153 Mr. John Sish took no ordinary Care in Strengthening her, and in her Shething, which was as well performed as in any Ship that ever sailed on the Sea. 1748Anson's Voy. iii. vii. 367 Having by that time compleated the new sheathing of the first course..they continued the paying and sheathing the bottom. 1849Longfellow Building of Ship 191 The..seething Caldron, that..overflowed With the black tar, heated for the sheathing.
2. A protective layer or covering laid on the outside of the bottom of a wooden ship, to protect the planks from the borings of marine animals. Formerly of boards, etc., later usually of thin plates of metal (copper). Also a wooden covering sometimes used to protect the submerged parts of iron ships from corrosion by the water.
1587in J. S. Corbett Pap. rel. Sp. War (1898) 226 Decayed timbers..under the sheathing [MS. Shething]. 1633T. James Voy. 32 We saw some of the sheathing swim by vs. 1691T. H[ale] Acc. New Invent. p. xx, She had her sheathing strip'd at seven Years end to repair the Plank, but not for any defect in the Sheathing it self. 1728in 6th Rep. Dep. Kpr. Rec. App. ii. 155 A new method for preserving the plank and sheathing of Ships. 1784J. King Cook's 3rd Voy. vi. v. III. 289 The carpenters..proceeded to rip off the sheathing that had been injured by the ice, from the starboard side. 1849Cupples Green Hand ix. (1856) 99 A fathom or two from the bright copper of her sheathing along the water-line. 1886Sir N. Barnaby in Encycl. Brit. XXI. 819/1 The plank, or skin, or sheathing of a ship, both external and internal, is of various thicknesses.
b. gen. A covering or envelope in which something is encased for protection or ornament; material prepared for use as an envelope or casing. Chiefly in technical applications: e.g. a covering of boards, plates of metal, or other material, fitted to the surface of a wall, roof, or other part of a building, a piece of machinery, or the like.
1859Habits of Gd. Society iii. 132 A loose covering is both more comfortable and more healthy than a tight sheathing of cloth [i.e. tight trousers]. 1867W. H. Smyth Coal & Coal-mining 116 Upon the upper one the plates or segments of tubbing are built up, sheathing of pitch pine, 3/8 or ½ inch thick, being inserted between all the contact surfaces, and the vertical joints broken, as in stone work. 1868Art Jrnl. 1 Feb. 35/2 Mural sheathings imitative of the finest Persian patterns. 1881Raymond Mining Gloss., Sheathing, a close partition or covering of planks. 1909Chamb. Jrnl. Oct. 687/2 The sea-cow..is..skinned—for the back sheathing is thick and hard in texture, rendering it useful for many purposes.
c. Sheathing paper.
1859Stationers' Hand-bk. 81 Sheathing, a large thick brown paper, used for ships' bottoms, usually made to order.
3. A banking of loose stones to prevent overflowing of a river. Cf. sheath1 6; also camp-sheathing, var. of campshedding.
1867F. Francis Angling viii. 246 Working his bait..behind piles, and under the apron or sheathing [of the weir].
4. attrib. (sense 2, 2 b), as sheathing board, sheathing copper, sheathing felt, sheathing lead, sheathing paper; sheathing-nail (see quot.).
1628in Foster Eng. Factories India (1909) III. 251 Planck, *sheathinge boards, laths. 1773Cook's 1st Voy. iii. iii. in Hawkesw. Voy. III. 546 We saw by the light of the moon the sheathing boards from the bottom of the vessel floating away all round her.
1800Hull Advertiser 20 Sept. 2/1 Small cordage, sheathing paper, *sheathing copper, and ships stores. 1840R. H. Dana Bef. Mast xxxii. 124 Sheets of sheathing-copper. 1834–6P. Barlow Manuf. §1064 in Encycl. Metrop. (1845) VIII. 763/1 Sheathing felt is applied in coppered ships immediately below the copper.
1691T. H[ale] Acc. New Invent. 83 The Goodness of *Sheathing-Lead to line the Bread-rooms.
1611Cotgr., Clou d'estoupe, a speake, or *sheathing nayle; vsed in ships. c1850Rudim. Nav. (Weale) 134 Sheathing nails are used to fasten wood sheathing on the ship's bottom, to preserve the plank and prevent the filling nails from tearing it too much. Sheathing nails, for nailing copper sheathing, are of metal cast in moulds, about 11/4 inch long.
1794Morse Amer. Geog. 214 Writing and printing paper, *sheathing and wrapping paper. 1861J. Spence Amer. Union v. 182 Paper is under a prohibitory duty of 30 per cent., but sheathing paper pays only 10 per cent.
▪ II. sheathing, ppl. a.|ˈʃiːθɪŋ|
[f. sheathe v. + -ing2.]
That sheathes.
1847Tennyson Princess v. 39 And transient in a trice From what was left of faded woman-slough To sheathing splendours and the golden scale Of harness. 1908Smithsonian Misc. Collect. LII. 16 A sheathing projection on occiput, and one above opercle.
b. Bot.
1778Encycl. Brit. (ed. 2) II. 1297/1 Vaginans, [of a leaf] sheathing, or with its base forming a cylindrical tube investing the stem. 1796Withering Brit. Plants (ed. 3) I. 25 This long purplish substance which stands upright within the sheathing conical Calyx. 1847W. E. Steele Field Bot. 209 The sheathing bases of the leaves. 1861S. Thomson Wild Fl. i. (ed. 4) 40 The attachment of the leaves of parallel-veined plants is often what is called sheathing, as we see in the grasses,..in which the leaf springs from a sheath..which embraces the stem. 1884Bower & Scott De Bary's Phaner. 141 Membranous sheathing layers of a granular substance.
c. Anat. (See quot.)
1889Century Dict. s.v. Canal, Sheathing canal (canalis vaginalis), the communication of the cavity of the tunica vaginalis testis with the general peritoneal cavity of the abdomen. |