1. The organ that makes lymphocytes and stores and filters blood and destroys the old red blood cells. 2. Bad temper and ill will. 3. Old term for depression and melancholy.

SPLEEN: "Joe vented his spleen at his boss for all of his mistakes in Joe's wages."
Cite this page: N., Pam M.S., "SPLEEN," in PsychologyDictionary.org, April 13, 2013, https://psychologydictionary.org/spleen/ (accessed October 25, 2020).