Synonyms|0Antonyms|0|Broader|2Narrower|2Related|0
0
egg-laying mammal
0
monotreme
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APASmart Define. (2011). prototherian thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/prototherian/thesaurus/narrower
ChicagoSmart Define. 2011. "prototherian thesaurus" https://smartdefine.org/prototherian/thesaurus/narrower (accessed September 23, 2026).
HarvardSmart Define 2011, prototherian thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/prototherian/thesaurus/narrower>.
MLASmart Define. "prototherian thesaurus" 26 April 2011. Web. 23 September 2026. <https://smartdefine.org/prototherian/thesaurus/narrower>