Spleens

noun

1. 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.
2. (except in the set phrase "to vent one's spleen") A bad mood; spitefulness.
3. A sudden motion or action; a fit; a freak; a whim.
4. Melancholy; hypochondriacal affections.
5. A fit of immoderate laughter or merriment.