Radioactive isotope
radioactive isotope n.
An isotope having an unstable nucleus that decomposes spontaneously by emission of a nuclear electron or helium nucleus and radiation, thus achieving a stable nuclear composition.
Read Also:
- Radioactive-series
noun, Physics, Chemistry. 1. a succession of elements initiated in the radioactive decay of a parent, as thorium or uranium, each of which decays into the next until a stable element, usually lead, is produced. noun 1. (physics) a series of nuclides each of which undergoes radioactive decay into the next member of the series, […]
- Radioactive-waste
noun 1. the radioactive by-products from the operation of a nuclear reactor or from the reprocessing of depleted nuclear fuel. noun 1. any waste material containing radionuclides Also called nuclear waste Radioactive materials that may be left after a commercial or laboratory process has been carried out. Some is “low-level” waste, such as objects that […]
- Radio alarm
noun clock radio Examples Easily switch between your favorite stations on the radio alarm with preset tuning buttons. Word Origin 1949
- Radio-astronomy
noun 1. the branch of astronomy that utilizes extraterrestrial radiation in radio wavelengths rather than visible light for the study of the universe. noun 1. a branch of astronomy in which a radio telescope is used to detect and analyse radio signals received on earth from radio sources in space radio astronomy The study of […]
- Radioautograph
[rey-dee-oh-aw-tuh-graf, -grahf] /ˌreɪ di oʊˈɔ təˌgræf, -ˌgrɑf/ noun 1. . /ˌreɪdɪəʊˈɔːtəˌɡrɑːf; -ˌɡræf/ noun 1. another name for autoradiograph radioautograph ra·di·o·au·to·graph (rā’dē-ō-ô’tə-grāf’) n. See autoradiograph.