a nuclear reactor in which a fission reaction takes place
- Fission track
fission track A track left by the decay of uranium atoms in a mineral. By analyzing the number and nature of these tracks in a sample mineral and inducing further fission of the remaining uranium by irradiation with neutrons to create new tracks for comparison, one can estimate the approximate age of the sample.
- Fission-track dating
noun 1. the dating of samples of minerals by comparing the tracks in them by fission fragments of the uranium nuclei they contain, before and after irradiation by neutrons
[fis-uh-pal-meyt] /ˌfɪs əˈpæl meɪt/ adjective, Anatomy. 1. (of birds) having the toes lobed or partially webbed. /ˌfɪsɪˈpælmeɪt/ adjective 1. (of some birds’ feet) partially webbed, having lobes and fringes on separate toes
fissiparity fis·si·par·i·ty (fĭs’ə-pār’ĭ-tē) n. See schizogenesis.