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4 entries under geohistory topic. ×

1
eocene bird(noun, eocene, bird)
1
oligocene bird(noun, bird, oligocene)
1
paleogene bird(noun, bird, paleogene)
0
paleocene bird(noun, paleocene, bird)
For more, visit Presbyornis on Power Thesaurus
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APASmart Define. (1970). presbyornis thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/presbyornis/thesaurus/broader
ChicagoSmart Define. 1970. "presbyornis thesaurus" https://smartdefine.org/presbyornis/thesaurus/broader (accessed October 1, 2026).
HarvardSmart Define 1970, presbyornis thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/presbyornis/thesaurus/broader>.
MLASmart Define. "presbyornis thesaurus" 1 January 1970. Web. 1 October 2026. <https://smartdefine.org/presbyornis/thesaurus/broader>