spleen

Definition

A fist-sized immunological powerhouse lurking in your left abdomen that filters old blood cells and manufactures lymphocytes—basically a tiny, overlooked factory worker keeping your immune system employed. Medical professionals get weird about its specific location because it's paradoxically vital yet entirely optional.

Example Usage

The ER ordered an emergency ultrasound to rule out splenic rupture after the MVA.

Source: Medical and anatomical terminology

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