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1. A large dark-red oval organ on the left side of the body between the stomach and the diaphragm; produces cells involved in immune responses
   - lien [archaic]
    
2. A tendency to become angry quickly
   - irascibility, short temper, quick temper, short fuse

Derived forms: spleens

Type of: bad temper, ill temper, lymphatic tissue, lymphoid tissue

Part of: lymphatic system, systema lymphaticum

Encyclopedia: Spleen