designating, of, or below the lower jaw; esp., designating or of either of two salivary glands, one on each side, below the inside edge of the lower jaw
See submaxillary in American Heritage Dictionary 4
sub·max·il·lar·y
adjective
Of or relating to the lower jaw: a submaxillary fracture.
Situated beneath the maxilla: the submaxillary salivary glands.
nounpl.sub·max·il·lar·ies
An anatomical part, such as a gland or nerve, that is situated beneath the maxilla.