Definition of perigenesis in US English:

perigenesis

noun

Biology
historical
  • Haeckel's term for: a former theory of reproduction in which it was supposed to be caused by regular vibrations of plastidules.

Origin

Late 19th century; earliest use found in Edward Cope (1840–1897). From German Perigenesis from peri- + Genesis.

Pronunciation

perigenesis

/ˌpɛrɪˈdʒɛnɪsɪs/