| NU | the sum of the number of neutrons and protons in an atomic nucleus |
|---|---|
| NU | the branch of physics that studies the internal structure of atomic nuclei |
| NU | the protoplasm that constitutes the nucleus of a cell |
| NU | any of several substances found in the nuclei of all living cells |
| NU | a glycoside formed by partial hydrolysis of a nucleic acid |
| NU | a phosphoric ester of a nucleoside |
| NU | a part of the cell containing DNA and RNA and responsible for growth and reproduction |
| NU | any histologically identifiable mass of neural cell bodies in the brain or spinal cord |
| NU | a small group of indispensable persons or things |
| NU | the positively charged dense center of an atom |
| NU | (astronomy) the center of the head of a comet |
| NU | ctenophores lacking tentacles |