Lamarckian

[ luh-mahr-kee-uh n ]
/ ləˈmɑr ki ən /

adjective

of or relating to Jean de Lamarck or his theory of organic evolution.

noun

a person who holds this theory.

Origin of Lamarckian

First recorded in 1840–50; Lamarck + -ian
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for lamarckian

Lamarckian

/ (lɑːˈmɑːkɪən) /

adjective

of or relating to Lamarck

noun

a supporter of Lamarckism
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012