[luh-mahr-kee-uh n]


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


a person who holds this theory.

Origin of Lamarckian

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

Examples from the Web for lamarckian

Historical Examples of lamarckian

  • Neither jaws nor brain can have been evolved on the Lamarckian principle.

  • Even a Lamarckian will allow this to be within the range of possibility.

  • He, being a Lamarckian, ascribes this to the inherited effects of use.

  • But even in the two Lamarckian factors there is a difference in grade.


    Joseph Le Conte

  • In this controversy, however, there was another string to the Lamarckian bow.

    Parallel Paths

    Thomas William Rolleston

British Dictionary definitions for lamarckian



of or relating to Lamarck


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

Word Origin and History for lamarckian



1846, pertaining to French botanist and zoologist J.B.P. Lamarck (1744-1829), especially his view that the process of evolution includes the inheritance of acquired characteristics.

Online Etymology Dictionary, © 2010 Douglas Harper