There are usually two pairs in Crustacea and one pair in insects. In
certain insects they are not used as jaws, but may form suctorial
organs. See Illust. under Lepidoptera, and Diptera.
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{ Max"il*lar (?), Max"il*la*ry (?), } a. [L. maxillaris, fr. maxilla
jawbone, jaw: cf. F. maxillaire.] 1. (Anat.) Pertaining to either the
upper or the lower jaw, but now usually applied to the upper jaw only.
-- n. The principal maxillary bone; the maxilla.