(uncountable) The act of securing authorization rights independently from the intermediaries that utilize them and the parties to which they apply

(physics) An artificial helium-like atom where the Coulombic electron-nucleus interaction potential is replaced by a harmonic potential.

plural of atomic nucleus

The energy released by an atom in a nuclear reaction.

nuclear forensics

(chemistry) The amount of an element whose mass in grams is that of its atomic weight; a mole of atoms.

plural of atomic pile

(physics, atomic) The branch of physics that studies the internal structure of atomic nuclei.

(US, slang) A prank in which a person's underpants are pulled up sharply from behind up over the head, or higher, in order to wedge the clothing uncomfortably between the person's buttocks.

(signal processing) A kind of function used in the analysis proposed by Dennis Gabor in 1946 in which a family of functions is built from translations and modulations of a generating function.