Actinon
a chemically inert, gaseous, short-lived isotope of radon that is a member of the . symbol: an; atomic number: 86; atomic weight: 219.
noun
a radioisotope of radon that is a decay product of radium. symbol: an or 219rn; atomic no: 86; half-life: 3.92s
another name for actinide
Read Also:
- Actinopod
any protozoan of the subcl-ss actinopoda, including the heliozoans and radiolarians, having stiff, rodlike, radiating pseudopodia. noun any protozoan of the phylum actinopoda, such as a radiolarian or a heliozoan, having stiff radiating cytoplasmic projections
- Actinopods
any protozoan of the subcl-ss actinopoda, including the heliozoans and radiolarians, having stiff, rodlike, radiating pseudopodia. noun any protozoan of the phylum actinopoda, such as a radiolarian or a heliozoan, having stiff radiating cytoplasmic projections
- Actinopterygian
belonging or pertaining to the actinopterygii, a group of bony fishes. an actinopterygian fish. historical examples major adaptive levels in the evolution of the actinopterygian feeding mechanism. a new genus of pennsylvania fish (crossoperygii, coelacanthiformes) from kansas joan echols actinopterygian (āk’tə-nŏp’tə-rĭj’ē-ən) see ray-finned fish.
- Actinotherapy
radiotherapy, especially using ultraviolet rays. noun a former name for radiotherapy actinotherapy ac·ti·no·ther·a·py (āk’tə-nō-thěr’ə-pē) n. the therapeutic use of ultraviolet light.
- Actinouranium
. noun the isotope of uranium that has a m-ss number of 235