1.  node(n = noun.shape) - a connecting point at which several lines come together;
is a kind of connection, connexion, link

2.  node(n = noun.shape) knob, thickening - any thickened enlargement;
is a kind of convex shape, convexity

3.  node(n = noun.plant) leaf node - (botany) the small swelling that is the part of a plant stem from which one or more leaves emerge;
is a kind of enation, plant process
is a part of stalk, stem

4.  node(n = noun.location) - (physics) the point of minimum displacement in a periodic system;
is a kind of point
Antonym: antinode

5.  node(n = noun.location) - (astronomy) a point where an orbit crosses a plane;
is a kind of celestial point
has particulars: ascending node, descending node

6.  node(n = noun.body) lymph gland, lymph node - the source of lymph and lymphocytes;
is a kind of lymphatic tissue, lymphoid tissue
is a part of immune system, cardiovascular system, circulatory system
has particulars: axillary node, peter's gland, peyer's patch, bubo

7.  node(n = noun.body) - any bulge or swelling of an anatomical structure or part;
is a kind of solid body substance
has particulars: nodule

8.  node(n = noun.artifact) client, guest - (computer science) any computer that is hooked up to a computer network;
is a kind of computer, computing device, computing machine, data processor, electronic computer, information processing system
is a part of computer network

1.  A knot, a knob; a protuberance; a swelling. [1913 Webster]

2.  One of the two points where the orbit of a planet, or comet, intersects the ecliptic, or the orbit of a satellite intersects the plane of the orbit of its primary. [1913 Webster]

3.  A special point in a graph or diagram which is attached to other points by links. It is often labeled and represented graphically as a box or circle. A node may represent any object which is related to other objects in a conceptual structure that can be represented as a graph, the relations being represented as links between the nodes. [PJC]

4.  A small mass of tissue differing from other tissue in its immediate vicinity; as, a lymph node. [PJC]

node, n.
1 Bot. a the part of a plant stem from which one or more leaves emerge. b a knob on a root or branch.
2 Anat. a natural swelling or bulge in an organ or part of the body.
3 Astron. either of two points at which a planet's orbit intersects the plane of the ecliptic or the celestial equator.
4 Physics a point of minimum disturbance in a standing wave system.
5 Electr. a point of zero current or voltage.
6 Math. a a point at which a curve intersects itself. b a vertex in a graph.
7 a component in a computer network.

Derivative:
nodal adj. nodical adj. (in sense 3).

Etymology:
L nodus knot

N  convexity, prominence, projection, swelling, gibbosity, bilge, bulge, protuberance, protrusion, camber, cahot, thank-ye-ma'am, swell, intumescence, tumour, tumor, tubercle, tuberosity, excrescence, hump, hunch, bunch, boss, embossment, hub, hubble, tooth, knob, elbow, process, apophysis, condyle, bulb, node, nodule, nodosity, tongue, dorsum, bump, clump, sugar loaf, bow, mamelon, molar, belly, corporation, pot belly, gut, withers, back, shoulder, lip, flange, pimple, zit, wen, wheel, papula, pustule, pock, proud flesh, growth, sarcoma, caruncle, corn, wart, pappiloma, furuncle, polypus, fungus, fungosity, exostosis, bleb, blister, blain, boil, airbubble, blob, papule, verruca, papilla, nipple, teat, tit, titty, boob, knocker, pap, breast, dug, mammilla, proboscis, nose, neb, beak, snout, nozzle, schnoz, peg, button, stud, ridge, rib, jutty, trunnion, snag, cupola, dome, arch, balcony, eaves, pilaster, relief, relievo, cameo, bassorilievo, mezzorilevo, altorivievo, low relief, bas relief, high relief, hill, cape, promontory, mull, forehead, foreland, point of land, mole, jetty, hummock, ledge, spur, naze, ness, convex, prominent, protuberant, projecting, bossed, embossed, bossy, nodular, bunchy, clavate, clavated, claviform, hummocky, moutonne, mammiliform, papulous, papilose, hemispheric, bulbous, bowed, arched, bold, bellied, tuberous, tuberculous, tumous, cornute, odontoid, lentiform, lenticular, gibbous, club shaped, hubby, hubbly, knobby, papillose, saddle-shaped, selliform, subclavate, torose, ventricose, verrucose, salient, in relief, raised, repousse, bloated, (expanded).

ascending node, atrioventricular node, axillary node, descending node, lymph node, mucocutaneous lymph node syndrome, sa node, sinoatrial node