the.com/lymph node

means A small, bean-shaped organ in the lymphatic system that filters lymph fluid and harbors immune cells that detect and attack pathogens.

from From Latin 'lympha,' meaning clear water or a water goddess, which Latin borrowed and reshaped from Greek 'nymphē' (nymph) — the spirit of springs and streams. 'Node' comes from Latin 'nodus,' simply 'knot,' describing the small knotted swellings strung along the body's lymphatic channels. So the name is literally 'a knot in the clear-water system' — accurate, if you've ever felt one swell under your jaw.