Definition of neo-Lamarckian in US English:

neo-Lamarckian

adjective

Biology
historical
  • Of or relating to neo-Lamarckism.

noun

Biology
historical
  • A proponent or advocate of neo-Lamarckism.

Origin

Late 19th century; earliest use found in Alpheus Packard (1839–1905). From neo- + Lamarckian. Compare French néo-lamarckien, noun.