3 entries under idiom topic. ×
| survival of the fittest(noun, expression, theory, evolution) | |
| theory of evolution(noun, expression, theory, evolution) | |
| law of the jungle(noun, expression, theory, evolution) |
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| APA | Smart Define. (2015). natural selection thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/natural_selection/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "natural selection thesaurus" https://smartdefine.org/natural_selection/thesaurus/synonyms (accessed September 25, 2026). |
| Harvard | Smart Define 2015, natural selection thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/natural_selection/thesaurus/synonyms>. |
| MLA | Smart Define. "natural selection thesaurus" 10 April 2015. Web. 25 September 2026. <https://smartdefine.org/natural_selection/thesaurus/synonyms> |