In vertebrates, including humans, a ductless vascular gland, located in the left upper abdomen near the stomach, which destroys old red blood cells, removes debris from the bloodstream, acts as a reservoir of blood, and produces lymphocytes.
(except in the set phrase "to vent one's spleen") A bad mood; spitefulness.
A sudden motion or action; a fit; a freak; a whim.
Melancholy; hypochondriacal affections.
A fit of immoderate laughter or merriment.
To dislike.