Page:Dictionary of aviation.djvu/262

 238 DICTIONARY OF AVIATION

outlet, or inlet, as the one inserted at the tep of a balloon, for letting out mflating^gas.

emergency valve, a balloonsvalv which works automati- cally in case of an emergency.

valve-line 'vaelv,lam n. [also spelt valvtline] a line con- tjolling the valv of a balloon.

valve-rim 'vaelv,zim n. [also spelt valv*rim\ the rim or marginal part of a balloon^valv.

valve-ring 'viclv^ii] n. [also spelt valvzring} a ring which is connected with or encircles a balloon^valv.

valve-rope 'vselv,zoop n. [also spelt valvtrope] a rope con- trolling a balloon^valv ; a valv^line.

valve-tender 'v3elv,tender n. [also spelt valvttender] one who tends or operates a balloon^valv.

valve-string 'v3elv,str.ir) n. [also spelt valvtstring] the string controlling a balloon^valv; a valv^line or valv^rope.

van vaen n.

1. a vane or web of a bird's fether on either side of the shaft; the vexillum; the pogonium.

2. a wing or wing^like ergan or structure; a sail. vane veen n.

1. a wetherceck or wethervane; also, a similar device, as in an anemometer.

2. a saiklike or winglike supporting^, propelling^, or guid- ing^stjucture, as one of the blades of an aerial wheel, one of the plates or floats of a windmill, or one of the pieces of fether attacht to either side of the neck^end of an arrow.

3. the web or vexillum of a bird's fether on either side of the shaft; the pogonium; the van.

vane-wheel 'veen^iil. an aerial tuheel fitted with vanes or blades; a screw^vane.

vapor 'vee-p3z n. [also spelt vapour] any visible diffused substance, especially feg, mist, cloud, or condenst steam, f oating in or obscuring the air or atmosfere; water^vapor ; (in fysics) the gaseous form of a substance which is usually selid or liquid : as, mercury *vapor.

vapor-condition 'vee-paz-kan/hSan n. the condition ef, or as to, atmosferic vapor or vapors.

vapor-dust 'vee-pa^dASt n. atmosferic dust consisting of minute globules of water condenst from aqueous vapor, appreciable by certain optical effects but net visible as feg or haze; dustevapor.

vapor-laden 'vee-p3<r,!ee-dn adj. laden or loaded with va- por, as air.

vaporous 'vee-pa-zas adj. having the ferm or nature of vapor; vapory.

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