Definition of nepionic in English:

nepionic

adjective

Biology
  • Designating the early postembryonic stages of ontogeny, specifically the stage between the embryonic and the neanic; of, relating to, or at such a stage of development.

Origin

Late 19th century. From ancient Greek νήπιος infant, child (of uncertain origin) + -onic.

Pronunciation

nepionic

/ˌniːpɪˈɒnɪk/