n.
Pronunciation: ' nü- ˌ kl ī d, ' nyü-
Function: noun
Etymology: nucl eus + Greek eidos form, species ― more at IDOL
Date: 1947
: a species of atom characterized by the constitution of its nucleus and hence by the number of protons, the number of neutrons, and the energy content
– nu · clid · ic \ nü- ' kli-dik, nyü- \ adjective