ornithologize UK /ˌɔːnɪˈθɒləd͡ʒaɪz/US /ˌɔɹnɪˈθɑləd͡ʒaɪz/ verb1 •To practise ornithology.I have pretty well finished ornithologizing this spring, and have done worse than ever. — 1847 formsornithologized · ornithologizing · ornithologizes