chevron (n.)

late 14c., in heraldry, "a device in the shape of an inverted V," from Old French chevron "rafter; chevron" (13c.), so called because it looks like rafters of a shallow roof, from Vulgar Latin *caprione, from Latin caper "goat" (see cab); the hypothetical connection between goats and rafters being the animal's angular hind legs. Compare gambrel, also Latin capreolus "props, stays, short pieces of timber for support," literally "wild goat, chamoix."