The Collaborative International Dictionary of English v.0.48:

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.]
   1. (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.
      [1913 Webster]

   2. (Mil.) A distinguishing mark, above the elbow, on the
      sleeve of a non-commissioned officer's coat.
      [1913 Webster]

   3. (Arch.) A zigzag molding, or group of moldings, common in
      Norman architecture.
      [1913 Webster]

   Chevron bones (Anat.), The V-shaped subvertebral arches
      which inclose the caudal blood vessels in some animals.
      [1913 Webster]