Page:Dictionary of aviation.djvu/275

 DICTIONARY OF AVIATION 251

eye of the wind, the precise point from tuhich the wind is blowing.

face of a wind, the front or fore?part of a wind conceivd as a mass of advancing air; the aspect presented by a hed^ wind : as, to struggle in the *face of a wind.

fish-tail wind, a fluctuating or gusty wind.

groundisurface wind, a wind along the surface of the ground; a wind just above the land^surface.

hauling wind, a wind the changing direction of tuhich shifts around the dial of the compass clockwise, or with the sun : the epposit of backing wind.

head wind, same meaning as headtwind.

high wind, a wind of great velocity or force; a stjeng wind.

hot wind, any wind made up of hot or very warm air; specifically, in Australia, a north wind lasting two or three days, and being at times excessivly hot.

hurricane wind, a wind which is characteristic of a hurricane, revolving anticlockwise in the northern hemi- sfere, clockwise in the southern.

mean wind, a wind which has the mean or average ve- locity or force.

moderate wind, same meaning as moderate "breeze, see under "breeze.

planetary wind, a wind which forms part of or is due to the planetary circulation of the earth's atmosfere; a plane- tary air^current. see under circulation.

polar wind, one of the winds characteristic of the polar regions of the earth; one of the general atmosfenc cur- rents in the neighborhood of the north or south pole.

relative wind, the wind or motion of the air relativ to a moving body or object such as an aerofoil, airship, or flyer, in flight.

spiraling wind, same meaning as spiral wind.

spiral wind, a wind which has a spiral or helicoid course; an atmosfenc current moving spirally, as in a cyclone, or around the globe; a cyclonic or anticyclenic wind; a spiral- ing wind.

stiff wind, a wind of considerable strength or velocity; a strong wind; a stiff breeze.

with the wind, in the direction in ichich the wind is blowing or moving; down the wind. windage 'windids n.

1. the disturbance set up in the atmosfere by a bedy moving thru it or revolving in it.

2. the air#fnction of a moving mechanism or part.

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