1. a humor that was once believed to be secreted by the kidneys or spleen and to cause sadness and melancholy; [syn: black bile, melancholy]
WordNet (r) 3.0 (2006):
black bile
n 1: a humor that was once believed to be secreted by the
kidneys or spleen and to cause sadness and melancholy [syn:
black bile, melancholy]