(n.) The theory that structural variations, characteristic of species and genera, are produced in animals and plants by the direct influence of physical environments, and especially, in the case of animals, by effort or by use or disuse of certain organs.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). lamarckism. Retrieved September 25, 2026, from http://smartdefine.org/lamarckism/definitions/2026304 |
| Chicago | Webster's. 2011. "lamarckism" http://smartdefine.org/lamarckism/definitions/2026304 (accessed September 25, 2026). |
| Harvard | Webster's 2011, lamarckism, Smart Define, viewed 25 September, 2026, <http://smartdefine.org/lamarckism/definitions/2026304>. |
| MLA | Webster's. "lamarckism" 27 May 2011. Web. 25 September 2026. <http://smartdefine.org/lamarckism/definitions/2026304> |