Dog Pup. These cute pups are part of the sled dog team at Denali -- the only national park in the U.S. with working dogs. Sled dogs have an essential role in the life and culture of Alaska, and Denaliâs team helps protect a national park and the wildlife, scenery and wilderness therein.
a branch of physics that studies the structure of the atomic nucleus, the processes of radioactive decay, and the mechanism of nuclear reactions. The meaning of the term is frequently expanded to include the physics of elementary particles as well. Sometimes areas of research that have become independent branches of technology, such as accelerator technology and nuclear power industry, continue to be considered as branches of nuclear physics.
The definition of nuclear is relating to the nucleus of a cell, or relating to atomic or hydrogen bombs. 1  An example of nuclear used as an adjective is the phrase nuclear energy which means energy that comes from the nucleus of a cell.