Splenial

noun

1. In zoology and anatomy: Acting like a splint or clasp; having the character of a splenial: noting one of the pieces of the compound ramus of the lower jaw of many vertebrates below mammals.
2. Of or pertaining to the splenium of the brain: as, the splenial border of the corpus callosum. See splenium.
3. Of or pertaining to a splenius: as, the splenial muscles of the neck.
4. The splenial element of the compound mandible of a vertebrate below a mammal.
5. The splenial bone.