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spar |
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spar. For dogtooth spar, see calcite calcite (kăl`sīt), very widely distributed mineral, commonly white or colorless, but appearing in a great variety of colors owing to ..... Click the link for more information. ; for fluorspar, see fluorite fluorite (fl ..... Click the link for more information. ; for heavy spar, see barite barite (bâr`īt), barytes ..... Click the link for more information. ; for satin spar, see calcite and gypsum gypsum (jĭp`səm), mineral composed of calcium sulfate (calcium, sulfur, and oxygen) with two molecules of water, CaSO4 ..... Click the link for more information. . See also Iceland spar Iceland spar, colorless variety of crystallized calcite , characterized by its properties of transparency and double refraction. It is used chiefly in the manufacture of Nicol prisms , which are essential parts of polarizing microscopes and other optical instruments. ..... Click the link for more information. and feldspar feldspar (fĕl`spär, fĕld`–) or felspar ..... Click the link for more information. . spar1 1. a. any piece of nautical gear resembling a pole and used as a mast, boom, gaff, etc. b. (as modifier): a spar buoy 2. a principal supporting structural member of an aerofoil that runs from tip to tip or root to tip spar2 an unaggressive fight spar any of various minerals, such as feldspar or calcite, that are light-coloured, microcrystalline, transparent to translucent, and easily cleavable spar [spär] (aerospace engineering) A principal spanwise member of the structural framework of an airplane wing, aileron, stabilizer, and such; it may be of one-piece design or a fabricated section. (mining engineering) A small clay vein in a coal seam. (mineralogy) Any transparent or translucent, nonmetallic, light-colored, readily cleavable, crystalline mineral; examples are calespar and fluorspar. (naval architecture) A long, round stick of steel or wood, often tapered at one or both ends, and usually a part of a ship's masts or rigging.
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| A lashed boat, a spare spar, a cask or what not secured about the decks, is "cast adrift" when it is untied. One little nook, for instance, was no larger than an unusually big doll's house, and yet it might have been a model for the whole place, for the water dropped, tiny icicles hung, and spar columns were forming in just the same way. True, they rather order me about some, and make me jump from spar to spar, like a grasshopper in a May meadow. |
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