curium
n.
5ModL, after Pierre & Marie Curie + 3IUM: so named (1946) by Glenn T(heodore) SEABORG, its discoverer, by analogy with the corresponding rare earth GADOLINIUM6 an extremely radioactive, metallic chemical element of the actinide series, generally produced by neutron irradiation of plutonium or americium: symbol, Cm; at. wt., (247); at. no., 96; sp. gr., 13.51; melt. pt.,