| 释义 |
vent-hole
Also venthole, vent hole.
[f. vent n.2 + hole n.]
1. A hole or opening for the admission or passage of air, light, etc.
1577B. Googe Heresbach's Husb. ii. (1586) 70 Afterward stop the vent holes that the Mole hath in euery place. 1733Tull Horse-Hoeing Husb. xiv. 186 A large Basket drawn up the middle of each [rick of sainfoin], to leave a Vent-Hole there. 1756–7tr. Keysler's Trav. (1760) III. 110 Two large vent-holes for light and air are made through the roof of this grotto. 1763Mills Pract. Husb. III. 123 It was covered with good oak planks,..leaving only some vent⁓holes, with trap doors, or covers, fitted very exactly to them. 1856Kane Arct. Expl. II. 113 Two huts and four families, but for these vent-holes entirely buried in the snow.
2. A hole or opening in a furnace, etc., for escape of smoke and gases or the admission of fresh air.
1612Sturtevant Metallica (1854) 118 The lower vent⁓holes let out the smoak. 1664Evelyn Sylva 101 You must make Vent-holes..through the stuff which covers your heap to the very wood. 1678R. R[ussell] tr. Geber ii. i. iv. vi. 96 A Furnace with large Ventholes gives both a clear and strong Fire. 1715Desaguliers Fires Impr. 16 The Passage X of the Bellows or Vent-Hole. Ibid., The Air will be made so thin over the Vent-Hole, as to press less than that which is coming from without. 1862M. Hopkins Hawaii 25 The suffocating gases which escaped from the red hot ventholes of these furnaces.
b. Any hole by which an enclosed space communicates with, or discharges into, the outside air.
1750Warburton Julian ii. vi, A bare and hollow rock; which would here and there afford vent-holes for such fumes as generated within to transpire. 1799G. Smith Laboratory I. 43 Water-balls have a hollow-globe, turned some⁓what oblong, with a vent-hole. 1800Phil. Trans. XC. 234 The case..was charged through its vent-hole, and introduced into a twelve-pounder carronade. 1802Encycl. Brit. Suppl. II. 748/1 Vent-holes may be bored in convenient parts of the deck..from whence the state of the corn may be known by the effluvia which ascend.
c. In fig. uses.
1711E. Ward Vulgus Brit. ii. 124 The Ventholes of their Passion. 1908Parish Councils 22 The council serves as a vent-hole for complaints and suspicions.
3. spec.
a. An air-hole in a cask; a vent.
1669Worlidge Syst. Agric. 120 Turn it up into the Vessel..to ferment, allowing but a small Vent-hole, lest the spirits waste. 1707Mortimer Husb. 573 Have near the Bung-hole a little Vent-hole stopp'd with a Spile. 1725Fam. Dict. s.v. Brewing, Opening and stopping the Vent⁓hole on every Change of Weather.
Comb.1875Knight Dict. Mech. 2703 Vent-faucet, an instrument which may act as a vent-hole borer.
b. (See quots.)
1728Chambers Cycl., Vent, Vent-Hole, or Spiracle, a little Aperture, left in the Tubes or Pipes of Fountains, to facilitate the Wind's escape. 1883Gresley Gloss. Coal-M. 269 Vent or Vent Hole, a small passage made with a needle through the tamping, which is used for admitting a squib, to enable the charge to be ignited. |