Found 2 items, similar to nucleon number.
English → English (WordNet) Definition: nucleon number nucleon number n : the sum of the number of neutrons and protons in an atomic nucleus [syn: mass number]
English → English (gcide) Definition: nucleon number nucleon number \nucleon number\ n. The sum of the number of neutrons and protons in an atomic nucleus. Syn: mass number. [WordNet 1.5 +PJC]