1) Of the lower jaw 
• (a.) Situated under the maxilla, or lower jaw; inframaxillary; as, the submaxillary gland. • (a.) Of or pertaining to submaxillary gland; as, submaxillary salvia.
(sәb-mak″sĭ-lar´e) below the maxilla.
Sub·max'il·la·ry adjective (Anat.) (a) Situated under the maxilla, or lower jaw; inframaxillary; as, the submaxillary gland. (b) Of or pertaining to submaxillary gland; as, submaxillary salvia. 
Type: Term Pronunciation: sŭb-mak′si-lār′ē Synonyms: mandibular, submandibular
of or pertaining to the lower jaw or lower jawbone.
Beneath the maxilla