a white radioactive metallic element belonging to the actinoids; a.n. 92; r.a.m. 238.03; r.d. 19.05 (20°C); m.p. 1132±1°C; b.p. 3818°C, radioaktiivne keemiline element, aktinoid, terashall metall, sulamistemperatuur 1132,2 ºC,tihedus (α-U) 19,1 Mg/m3