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vein (n.)c. 1300, from Old French veine "vein, artery, pulse" (12c.), from Latin vena "a blood vessel," also "a water course, a vein of metal, a person's natural ability or interest," of unknown origin. The mining sense is attested in English from late 14c. (Greek phleps "vein" had the same secondary sense). Figurative sense of "strain or intermixture" (of some quality) is recorded from 1560s; that of "a humor or mood, natural tendency" is first recorded 1570s.
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venule (n.)"small vein," 1850, from Latin venula, diminutive of vena "vein" (see vein).
Related entries & more venous (adj.)1620s, from Latin venosus "full of veins," from vena (see vein).
Related entries & more venation (n.)"arrangement of veins," 1640s, of plant structures, noun of state from Latin vena "vein" (see vein). Related: Venational.
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phlebo-
Related entries & more word-forming element in medicine meaning "a vein or veins," from Greek phlebo-, combining form of phleps "vein," a word of uncertain origin.
varices (n.)plural of varix "dilated vein" (c. 1400), from Latin varix "a varicose vein," which de Vaan derives from varus "bent outward, bow-legged," which is of uncertain origin (see vary).
Related entries & more mother lode
Related entries & more "important vein of an ore or mineral in rock," 1849, from mother (n.1) + lode (n.); said to be a translation of Mexican Spanish veta madre, a name given to rich silver veins. The American use is first in reference to a conspicuous vein of quartz rich in gold discovered during the gold rush in the Sierra Nevada of California. The colloquial or figurative sense of "richest source of something" is by 1916.
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