[nu.cle.ar] adj (1846) 1: of, relating to, or constituting a nucleus
2. a: of or relating to the atomic nucleus "~ reaction" "~ physics" b: used in or produced by a nuclear reaction (as fission) "~ fuel" "~ waste" "~ energy" c (1): being a weapon whose destructive power derives from an uncontrolled nuclear reaction (2): of, produced by, or involving nuclear weapons "the ~ age" "~ war" (3): armed with nuclear weapons "~ powers" d: of, relating to, or powered by nuclear energy "a ~ submarine" "the ~ debate" "a ~ plant"