Cobalt
41cobalt — noun Etymology: German Kobalt, alteration of Kobold, literally, goblin, from Middle High German kobolt; from its occurrence in silver ore, believed to be due to goblins Date: 1683 1. a tough lustrous silver white magnetic metallic element that is …
42cobalt 60 — noun Date: 1946 a heavy radioactive isotope of cobalt of the mass number 60 produced in nuclear reactors and used as a source of gamma rays (as for radiotherapy) …
43cobalt 60 — Chem. a radioactive isotope of cobalt having a mass number of 60 and a half life of 5.2 years, used chiefly in radiotherapy. [1945 50] * * * …
44cobalt — noun /ˈkəʊ.bɒlt/ a) A chemical element (symbol Co) with an atomic number of 27. b) Cobalt blue …
45cobalt 57 — a radioactive isotope of cobalt, atomic mass 57, having a half life of 271.77 days and decaying in the form of electron capture and gamma rays (energy 0.122 MeV); used to label vitamin B12 for the Schilling and other tests of intestinal… …
46cobalt 58 — a radioactive isotope of cobalt, atomic mass 58, having a half life of 71.92 days and decaying in the form of electron capture, positrons (energy 0.48 MeV), and gamma rays (energy 0.811 MeV); used together with 57Co in a test of intestinal… …
47cobalt — noun Cobalt is used before these nouns: ↑blue …
48Cobalt — Co|balt 〈n.; Gen.: (e)s; Pl.: unz.; chem. Zeichen: Co〉 graues, glänzendes, magnetisches Metall, Ordnungszahl 27, in Legierungen u. als Katalysator verwendet; oV [Etym.: nach Kobold (Hausgeist), nach dem alten Bergmannsglauben, das für wertlos… …
49cobalt — [ kəʊbɔ:lt, ɒlt] noun the chemical element of atomic number 27, a hard silvery white magnetic metal. (Symbol: Co) Derivatives cobaltic kə(ʊ) bɔ:ltɪk, bɒlt adjective cobaltous kə(ʊ) bɔ:ltəs, bɒlt adjective …
50cobalt 60 — n. chem. a radioisotope of cobalt having a mass number of 60 and a half life of 5.2 years, used chiefly in radiotherapy • Etymology: 1945–50 …
