The Collaborative International Dictionary
Chevron bones
Chevron \Chev"ron\ (sh[e^]v"r[u^]n), n. [F., rafter, chevron, from ch['e]vre goat, OF. chevre, fr. L. capra she-goat. See Cheveril.]
(Her.) One of the nine honorable ordinaries, consisting of two broad bands of the width of the bar, issuing, respectively from the dexter and sinister bases of the field and conjoined at its center.
(Mil.) A distinguishing mark, above the elbow, on the sleeve of a non-commissioned officer's coat.
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(Arch.) A zigzag molding, or group of moldings, common in Norman architecture.
Chevron bones (Anat.), The V-shaped subvertebral arches which inclose the caudal blood vessels in some animals.
Wiktionary
chevron bones
n. (chevron bone English)