Page:Dictionary of aviation.djvu/241

 DICTIONARY OF AVIATION 217

of low cloud consisting of separate irregular masses: net sufficiently uniform to be pure stratus; cumulo^stjatus. strato -nimbus ,stree-to'nimb3s n. stratus cloud causing

rain; stratus rain^cloud.

stratum 'stree-tam. [plural strata] a layer of any material, as air or cloud; an airzlayer.

reactive stratum, a stratum or layer of air which is com- prest by and reacts against an aerofoil, as the atmosferic stratum beneath a flying aeroplane or behind a revolving propeller.

stratus 'stee-tas n. [ploral strati] a continuous horizontal sheet or layer of fine^wether cloud, the lowest of all forms of cloud, increasing from beneath and characteristic of areas of high pressure; stratiform cloud; falkcloud; cloud of night.

stratus maculosus, mackerel^cloud, mackereksky. stream stiim n. a stedy current, as of water or air; a flow; a drift.

Gulf Stream, the part of the equatorial current in the wa- ters of the Atlantic Ocean which, having enterd the Carib- bean Sea, and past thru it and between Yucatan and Cuba into the Gulf of Mexico and thence thru the straits of Florida, emerges into the Atlantic Ocean, thru which it flows parallel to the American coast as far as Newfound- land, and thence toward Europe.

live stream, the lively or activly moving stream of air or other fluid flowing definitly about a streamline bedy or other obstacle : distinguisht from dead-water. stream-area 'stjiim / e:-si-9 n. area of fluid stream; the tract of flow, as of air along the surface of a streamline bedy.

streamer-cloud 'strii-m3z,kz,aod n. a cloud in the ferm of a streamer or banner, as the streamer of false cirrus from a thunder^hed; a banner^cloud.

streamline 'striim,lam n. a line of motion in a fluid, as air, which is moving in a stedy stream or stream system; one of the lines of direction in which the particles of a fluid are streaming.

streamline body, a bedy of streamline or ichthyoid ferm; a fish^shaped bedy.

streamline form, a ferm characteristic of streamline bodies; ichthyoid or fishlike ferm.

streamline motion, the motion of a stedy?moving fluid, considerd as made up of particles streaming or coursing along certain lines.

streamline surface, the surface of a streamline bedy.

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