Etymology: From the (term, esplen, lang=fro), < (term, splen, splÄn, lang=la), < Ancient Greek (term, sc=polytonic, , tr=splÄn, , milt, lag=grc) (Cognate with Russian (term, ÑÑ, lang=ru)).
- (context, anatomy, immunology) 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.
- (context, archaic, except in the set phrase ''"to vent
- Verb, vent one"s spleen") A bad mood; spitefulness.
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Full Definition of spleen