Of or pertaining to the side; situated at, proceeding from, or directed to a side: as, a lateral projection; lateral shoots or branches; a lateral view.In anatomy and zoology, situated on either side of the median vertical longitudinal plane of the body; lying laterad of the meson: as, the lateral ventricles of the brain; the lateral line of a fish; the lateral margin of a thorax, elytrum, or abdomen.In conchology, specifically, situated on either side of the hinge: contrasted with cardinal: as, the lateral tooth of a bivalve. Also admedian.In botany, belonging to or borne upon the side of any organ: sometimes contrasted with terminal (as, lateral buds), sometimes with medial (as, lateral ribs or nerves of a leaf or glume).In physics and mech., at right angles to a line of motion or of strain.n. In conch.:n. A lateral or admedian tooth of a bivalve, as distinguished from a cardinal tooth. See cut under bivalve.n. One of the uncini, or uncinal teeth of the radula.n. A side branch or division of anything; a part projecting from one side; specifically, in a grape-vine, one of the side shoots which spring from the axils of the leaves of a main shoot.n. A small ditch or distributary from a main or principal irrigation ditch.n. plural In the pelecypod mollusks, the lateral hinge-teeth, those lying at the sides or ends of the hinge-plate, anterior or posterior to the median or cardinal teeth.