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palaeontology

noun
🔊/ˌpæliɒnˈtɒlədʒi/, 🔊/ˌpeɪliɒnˈtɒlədʒi/
🔊/ˌpeɪliɑːnˈtɑːlədʒi/
 (especially British English)
(North American English usually paleontology)
[uncountable]
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  1. the study of fossils (= the parts of dead animals or plants in rocks) as a guide to the history of life on earth古生物学；化石学Topics Historyc2
    Word Originmid 19th cent.: from palaeo- + Greek onta ‘beings’ (neuter plural of ōn, present participle of einai ‘be’) + -logy.