Sple″ni‐al (?), a. [L. splenium a plaster, a patch, Gr. ���� a bandage.] (Anat.) (a) Designating the splenial bone. (b) Of or pertaining to the splenial bone or splenius muscle.
Splenial bone(Anat.), a thin splintlike bone on the inner side of the proximal portion of the mandible of many vertebrates.