What's the noun for spleen? Here's the word you're looking for.
spleen
(anatomy) 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.
“The association of acute splenitis with septicemia described in standard pathology texts is called into question.”
“At autopsy, mild acute splenitis and recurrent nodular sclerosis Hodgkin disease were found in fibrosed mediastinal nodes.”
“A search of the literature revealed scant testing of the alleged association of acute splenitis with systemic infection and no criteria for diagnosing acute splenitis.”