— nucleosynthetic /nooh'klee oh sin thet"ik, nyooh'-/ , adj.
/nooh'klee oh sin"theuh sis, nyooh'-/ , n. Physics, Astron.
the formation of new atomic nuclei by nuclear reactions, thought to occur in the interiors of stars and in the early stages of development of the universe.
[ 1955-60; NUCLEO- + SYNTHESIS ]