spleens

noun

1. 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. 2

   (except in the set phrase "to vent one's spleen") A bad mood; spitefulness.

3. 3

   A sudden motion or action; a fit; a freak; a whim.

4. 4

   Melancholy; hypochondriacal affections.

5. 5

   A fit of immoderate laughter or merriment.