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ornithology

noun
🔊/ˌɔːnɪˈθɒlədʒi/
🔊/ˌɔːrnɪˈθɑːlədʒi/
[uncountable]
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  1. the scientific study of birds鸟类学
    Word Originlate 17th cent.: from modern Latin ornithologia, from Greek ornithologos ‘relating to birds’.