As nouns the difference between splenia and splenial
is that splenia is while splenial is splenial bone.
As an adjective splenial is
relating to the splenium, especially describing the pair of muscles, at the back of the neck, that move the head and neck.
splenial
English
Adjective
(-)
Relating to the splenium, especially describing the pair of muscles, at the back of the neck, that move the head and neck