Page:Dictionary of aviation.djvu/268

 244 DICTIONARY OF AVIATION

droplets of water such as watered. ouds and mist are com- posed of; a minute glebule of water.

water-ship 'wc:-t3z,ship n. a ship that sails en the water; a vessel used for navigating the seas or other bodies of water : distmguisht from aerial ship and airship.

water-skid 'wc:-t3z,skid n. a skid or runner-like under- stjucture in a flying-machine designed to enable the craft to alight and rest upon or to launch itself from, a water? surface; a skid-like water-float or water-foot attacht to the base of a flying-machine.

water-sky 'wc:-t9z,skai n. a popular reflection in the sky, common in arctic regions, indicating the presence of open water beneath.

water-smoke 'wc:-t9z,SMOok n. smoke-like or steam-like fog or mist fermd over a body of water whose surface-tempe- rature is above the dew-point of the air, which is alredy saturated with water-vapor.

waterspout 'wc:-t3z,spaot n. a whirlwind characterized by a huge funnel-shaped mass of mist descending to the sur- face of a body of water, as the sea, inhere, picking up water, it forms a column reaching to the clouds; a vapor- spout; a windspout.

water-surface 'wc:-t3z,SBzfis n. the upper or free surface of a body of water; a surface which is of water rather than land : distinguish! from land f surf ace. compare water sur- face, under surface.

water-tight 'wota^tait adj. so tight as to resist the passage of water; impermeable to water.

wave weev n.

1. a continually propagated form which is assumed by parts of a body, as the air, when out of equilibrium.

2. a progressiv oscillation of atmosfenc pressure or temperature; also, an advancing movement of large extent in which these are considerably above or below the normal : as, a barometric *wave, a cold *wave.

cold wave, a wave of cold wether; an advancing atmos- fenc area which is characterized by a temperature which in any part is at least as low as 36 degrees Fahrenheit.

hot wave, a wave of hot wether; a heat-wave. wave weev v.

1. intr. move up or down or two and fro; undulate; sway : as, *waving wings.

2. tr. move up and down, as a wing; cause to sway. wave-action 'weev,2ek$3n adj. actuated by wave motion ;

moved by an undulating aerofoil or wave-surface, see under aeroplane.

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