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late 14c., from Old French serge (12c.), from Vulgar Latin *sarica, in Medieval Latin "cloth of wool mixed with silk or linen," from Latin serica (vestis) "silken (garment)," from serica, from Greek serike, fem. of serikos "silken" (see silk). The French word is the source of German sarsche, Danish sarge, etc.
(from Latin serica, "silk"), fabric much-used for military uniforms, made in an even-sided twill weave and usually clear-finished-that is, the fibre ends on the surface of the cloth are sheared or singed so that the twill weave is prominent. The resulting flat diagonal rib pattern goes from the lower left to the upper right selvage on the right side.