spleen meaning
EN
[spliːn] [-iːn] WSpleen
- The spleen (from Greek σπλήν—splḗn) is an organ found in virtually all vertebrates. Similar in structure to a large lymph node, it acts primarily as a blood filter.
- The spleen plays important roles in regard to red blood cells (also referred to as erythrocytes) and the immune system.
- The spleen synthesizes antibodies in its white pulp and removes antibody-coated bacteria and antibody-coated blood cells by way of blood and lymph node circulation.
- In humans, the spleen is brownish in color and is located in the left upper quadrant of the abdomen.
FR spleen 
- NounPLspleensSUF-éen
- (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.
- (archaic, except in the set phrase "to vent one's spleen") A bad mood; spitefulness.
- (obsolete, rare) A sudden motion or action; a fit; a freak; a whim.
- (obsolete) Melancholy; hypochondriacal affections.
- A fit of immoderate laughter or merriment.
- (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.
- VerbSGspleensPRspleeningPT, PPspleened
- (obsolete, transitive) To dislike.
- (obsolete, transitive) To dislike.
- More Examples
- Used in the Middle of Sentence
- Percussing a patient's spleen is best done while he is on his back.
- In teleosts, spleen is an important haematopoietic organ where melanomacrophages phagocytise and detain blood-borne antigens for a long period of time [43 ].
- Used in the Middle of Sentence
Definition of spleen in English Dictionary
- Part-of-Speech Hierarchy
- Nouns
- Countable nouns
- Countable nouns
- Verbs
- Transitive verbs
- Transitive verbs
- Nouns
Source: Wiktionary
Grammatically, this word "spleen" is a noun, more specifically, a countable noun. It's also a verb, more specifically, a transitive verb.