Etymology
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node (n.)

early 15c., "a knot or lump," from Latin nodus "knot" (from PIE root *ned- "to bind, tie"). Originally borrowed c. 1400 in Latin form, meaning "lump in the flesh." Meaning "point of intersection" (originally in astronomy, of planetary orbits with the ecliptic) is recorded from 1660s.

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Definitions of node

node (n.)
a connecting point at which several lines come together;
node (n.)
any thickened enlargement;
Synonyms: knob / thickening
node (n.)
(botany) the small swelling that is the part of a plant stem from which one or more leaves emerge;
Synonyms: leaf node
node (n.)
(physics) the point of minimum displacement in a periodic system;
node (n.)
(astronomy) a point where an orbit crosses a plane;
node (n.)
the source of lymph and lymphocytes;
Synonyms: lymph node / lymph gland
node (n.)
any bulge or swelling of an anatomical structure or part;
node (n.)
(computer science) any computer that is hooked up to a computer network;
Synonyms: client / guest
From wordnet.princeton.edu