D defs.my
Entry 2 senses Webster, 1913

Maxilla

/măk-sĭl'-ə/ · Max·il·la · IPA /mækˈsɪl.ə/
01 n. The bone of either the upper or the under jaw.
pl. Maxillae ((#))
  1. 1.
    The bone of either the upper or the under jaw.(Anat.) [Now commonly used in this restricted sense.]
  2. 2.
    One of the lower or outer jaws of arthropods.(Zool.)