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node Audio Help (nōd) Pronunciation Key
n.

A knob, knot, protuberance, or swelling.
1. Botany The point on a stem where a leaf is attached or has been attached; a joint.
2. See knot¹.
3. Either of two diametrically opposite points at which the orbit of a planet intersects the ecliptic.
4. Either of two points at which the orbit of a satellite intersects the orbital plane of a planet.
Physics A point or region of virtually zero amplitude in a periodic system.
Mathematics The point at which a continuous curve crosses itself.
Computer Science A terminal in a computer network.
Astronomy
1. Either of two diametrically opposite points at which the orbit of a planet intersects the ecliptic.
2. Either of two points at which the orbit of a satellite intersects the orbital plane of a planet.

[Middle English, lump in the flesh, from Latin nōdus, knot; see ned- in Indo-European roots.]

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The American Heritage Science Dictionary - Cite This Source - Share This

node Audio Help (nōd) Pronunciation Key

Anatomy A small mass or lump of body tissue that either occurs naturally, as in the case of lymph nodes, or is a result of disease.
Botany
1. A point on a stem where a leaf is or has been attached.
2. A swelling or lump on a tree; a knob or knot.
3. Either of the two points on the celestial sphere at which the path of a revolving body, such as the Moon, a planet, or a comet, intersects the ecliptic. ◇ The point at which the body traverses from south of the ecliptic to north is the ascending node. The opposite point, when the body traverses the ecliptic from north to south, is the descending node.
4. Either of the two points at which the orbit of an artificial satellite intersects the equatorial plane of the planet it is orbiting.
Physics A point or region of a vibrating or oscillating system, such as the standing wave of a vibrating guitar string, at which the amplitude of the vibration or oscillation is zero. Harmonic frequencies in oscillating systems always have nodes. Compare antinode.
Astronomy
1. Either of the two points on the celestial sphere at which the path of a revolving body, such as the Moon, a planet, or a comet, intersects the ecliptic. ◇ The point at which the body traverses from south of the ecliptic to north is the ascending node. The opposite point, when the body traverses the ecliptic from north to south, is the descending node.
2. Either of the two points at which the orbit of an artificial satellite intersects the equatorial plane of the planet it is orbiting.
Computer Science A computer or a peripheral that is connected to a network.