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Definition of ornithology noun from the Oxford Advanced Learner's Dictionary

ornithology

noun
 
/ˌɔːnɪˈθɒlədʒi/
 
/ˌɔːrnɪˈθɑːlədʒi/
[uncountable]
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  1. the scientific study of birds
    Word Originlate 17th cent.: from modern Latin ornithologia, from Greek ornithologos ‘relating to birds’.
See ornithology in the Oxford Advanced American Dictionary
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noun
 
 
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