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STRAIN (through O. Fr. straindre, eslraindre, mod. Ureindre, from Lat. stringere, to draw tight, related to stress, stretch, string, etc.), to draw out, extend, stretch, especially with the idea of great effort or beyond measure or limit; hence, from the idea of pressure or constriction, to separate coarser matter or light solids from a liquid by pressure through a " strainer," which may be either a sieve or a colander (Lat. colare, to strain) , a metal vessel with perforations in the bottom. Another type is the filter (q.v.). Straining can also be effected by means of cloths, and the name strainer is used of a coarse open doth usually of flax; a coarser cloth of a more open texture is technically known as " screw."

For " strains " and " stresses " in physics see MECHANICS; ELAS- TICITY and STRENGTH OF MATERIALS.

Note - this article incorporates content from Encyclopaedia Britannica, Eleventh Edition, (1910-1911)

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