lawrencio 144
lawrencium . ( Of e. o. Lawrence , 1901-1958, American physicist, founder of the laboratory where it was discovered). 1. m. Fís. Superheavy chemical element of no. atóm. 103 Obtained artificially by bombardment of californium with boron ions, it belongs to the actinide series, and its half-life is eight seconds. (Símb.) Lr ).