Proto-norse
noun
1.
the North Germanic language of Scandinavia up to about 700 a.d See also Old Norse
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noun, plural protonotaries. 1. prothonotary.
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[proh-ton-proh-ton] /ˈproʊ tɒnˈproʊ tɒn/ noun, Physics, Astronomy. 1. a series of thermonuclear reactions, responsible for the energy production in stars like the sun, in which the nuclei of hydrogen atoms are transformed into helium nuclei by sequential addition of single hydrogen nuclei. proton-proton chain A set of thermonuclear reactions in which hydrogen nuclei (protons) fuse […]
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noun, Physics, Chemistry. 1. a positively charged elementary particle that is a fundamental constituent of all atomic nuclei. It is the lightest and most stable baryon, having a charge equal in magnitude to that of the electron, a spin of ½, and a mass of 1.673 × 10− 27 kg. Symbol: P. noun 1. a […]
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noun, Physics. 1. a synchrotron used for accelerating protons.