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3 entries under noun topic. ×

1
eocene first appearance(animal, geohistory, appearance)
0
eocene cetacean(eocene, flora, cetacean)
0
eocene extinction(name, geohistory, extinction)
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APASmart Define. (1970). protocetidae thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/protocetidae/thesaurus/broader
ChicagoSmart Define. 1970. "protocetidae thesaurus" https://smartdefine.org/protocetidae/thesaurus/broader (accessed September 29, 2026).
HarvardSmart Define 1970, protocetidae thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/protocetidae/thesaurus/broader>.
MLASmart Define. "protocetidae thesaurus" 1 January 1970. Web. 29 September 2026. <https://smartdefine.org/protocetidae/thesaurus/broader>