Proton microscope
noun
1.
a powerful type of microscope that uses a beam of protons, giving high resolution and sharp contrast
Read Also:
- Proton-number
noun 1. atomic number. atomic number noun 1. the number of positive charges or protons in the nucleus of an atom of a given element, and therefore also the number of electrons normally surrounding the nucleus. Symbol: Z. Abbreviation: at. no.; atomic number noun 1. the number of protons in the nucleus of an atom […]
- Proto-norse
noun 1. the North Germanic language of Scandinavia up to about 700 a.d See also Old Norse
- Protonotary
noun, plural protonotaries. 1. prothonotary.
- Proton-proton chain
[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 […]
- Proton-pump inhibitor
noun 1. any of a group of drugs used to treat excessive secretion of acid in the stomach and any resulting ulcers. They block the enzyme (proton pump) in the cells of the gastric glands that secrete hydrochloric acid