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Glossary of Physics Terms
beginning with letter N
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N Tweet Definition of N Like Definition of N on Facebook
noun
  1. The fourteenth letter of the Appendix:Roman script, English alphabet, preceded by M and followed by O.
abbreviation
  1. (military) Navy
neper Tweet Definition of neper Like Definition of neper on Facebook
noun
  1. A unit of attenuation used in transmission line theory; equivalent to 8.686 dB.
neutrino Tweet Definition of neutrino Like Definition of neutrino on Facebook
noun (pluralneutrinos)
  1. (particles) An elementary particle that is classified as a lepton, and has an extremely small but nonzero mass and no electric charge. It interacts with the surroundings only via the weak force or gravitation, making it very difficult to detect.
neutron Tweet Definition of neutron Like Definition of neutron on Facebook
noun
  1. (particles) A subatomic particle forming part of the nucleus of an atom and having no charge; it is a combination of an up quark and two down quarks
Symbol: n
Newton Tweet Definition of Newton Like Definition of Newton on Facebook
noun , (plural: Newton)
  1. newton (unit of measure)
proper noun
  1. The name of many English places, from the Old English new settlement
  2. An English habitational surname for someone from any of these places
  3. w:Isaac Newton, Sir Isaac Newton, English physicist, mathematician, astronomer, alchemist, and natural philosopher
Newtonian mechanics Tweet Definition of Newtonian mechanics Like Definition of Newtonian mechanics on Facebook
noun
  1. (physics) early classical mechanics as propounded by w:Isaac Newton, Isaac Newton, especially that based on his laws of motion and theory of gravity
node Tweet Definition of node Like Definition of node on Facebook
noun (pluralnodes)
  1. A knot, a knob; a protuberance; a swelling.
  2. (Astronomy) The point where the orbit of a planet, as viewed from the sun, intersects the ecliptic. The ascending and descending nodes refer respetively to the points where the planet moves from S to N and N to S. The respective symbols are ☊ and ☋.
  3. The joint of a stem, or the part where a leaf or several leaves are inserted.
  4. A hole in the gnomon of a dial, through which passes the ray of light which marks the hour of the day, the parallels of the sun's declination, his place in the ecliptic, etc.
  5. (geometry) The point at which a curve crosses itself, being a double point of the curve. See Crunode, and Acnode.
  6. The point at which the lines of a funicular machine meet from different angular directions; -- called also knot.
  7. The knot, intrigue, or plot of a piece.
  8. A hard concretion or incrustation which forms upon bones attacked with rheumatism, gout, or syphilis; sometimes also, a swelling in the neighborhood of a joint.
  9. One of the fixed points of a sonorous string, when it vibrates by aliquot parts, and produces the harmonic tones; nodal line or point.
  10. A swelling.
  11. (graphtheory) A vertex of a graph.
  12. (computing_theory) (context, computer networking) A vertex or a leaf in a graph of a network; a computer or other device attached to a network
nonconductor Tweet Definition of nonconductor Like Definition of nonconductor on Facebook
noun
  1. any material that does not conduct electricity; a dielectric
nonflammable Tweet Definition of nonflammable Like Definition of nonflammable on Facebook
adjective
  1. Not combustable.
  2. Not easily set on fire.
NT Tweet Definition of NT Like Definition of NT on Facebook
initialism
  1. (stock symbol) w:Nortel, Nortel
  2. Northern Territory (of Australia)
  3. Northwest Territories (Canada)
  4. New Testament (Bible)
  5. New Territories (of Hong Kong)
  6. neurotensin
nuclear fission Tweet Definition of nuclear fission Like Definition of nuclear fission on Facebook
noun
  1. (physics) a nuclear reaction in which a large nucleus splits into smaller ones with the simultaneous release of energy
nuclear fusion Tweet Definition of nuclear fusion Like Definition of nuclear fusion on Facebook
noun
  1. (physics) The combining of the nuclei of small atoms to form the nuclei of larger ones, with a resulting release of large quantities of energy; the process that makes the sun shine, and hydrogen bomb explode.
nuclear magnetic resonance Tweet Definition of nuclear magnetic resonance Like Definition of nuclear magnetic resonance on Facebook
noun (abbreviated asNMR)
  1. (physics) The absorption of electromagnetic radiation (radio waves), at a specific frequency, by an atomic nucleus placed in a strong magnetic field; used in spectroscopy and in magnetic resonance imaging.
nuclear magneton Tweet Definition of nuclear magneton Like Definition of nuclear magneton on Facebook
noun
  1. (physics) the unit of magnetic moment used to describe nucleons such as the proton
nuclear physics Tweet Definition of nuclear physics Like Definition of nuclear physics on Facebook
noun
  1. The branch of physics that studies the nucleus of the atom, its internal structure and components.
nuclear reaction Tweet Definition of nuclear reaction Like Definition of nuclear reaction on Facebook
noun
  1. a process such as the fission of an atomic nucleus, or the fusion of one or more atomic nuclei and / or subatomic particles in which the number of protons and / or neutrons in a nucleus changes; the reaction products may contain a different element or a different isotope of the same element
nuclear reactor Tweet Definition of nuclear reactor Like Definition of nuclear reactor on Facebook
noun
  1. (physics) any device in which a controlled chain reaction is maintained for the purpose of creating heat (for power generation) or for creating neutrons and other fission products for experimental, medical or other purposes
nucleus Tweet Definition of nucleus Like Definition of nucleus on Facebook
noun (pl=nuclei, pl2=nucleuses)
  1. (context, chemistry, physics) The massive, positively charged central part of an atom made up of protons and neutrons.
  2. (cytology) A large organelle found in cells which contains genetic material.
  3. The central part (of something), round which others are collected.
  4. An initial part that will receive additions.
This collection will form the of a new library.
  1. (neuroanatomy) A cluster of many neuronal bodies where synapsing occurs.
nuclide Tweet Definition of nuclide Like Definition of nuclide on Facebook
noun
  1. (physics) An isotope of an element specified by its atomic number and atomic mass
    Example: Carbon 14 is specified as (nuclide, 14, 6, C) or 6-C-14

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