Submaxillary \Sub*max"il*la*ry\, a. (Anat.)
   (a) Situated under the maxilla, or lower jaw; inframaxillary; as, the submaxillary gland.
   (b) Of or pertaining to submaxillary gland; as, submaxillary salvia.

Source: Webster's Revised Unabridged Dictionary (1913)