/ ˌɔːnɪˈθɒlədʒi; NAmE ˌɔːrnɪˈθɑːl-/ noun
[ U ] the scientific study of birds
► or·ni·tho·logic·al / ˌɔːnɪθəˈlɒdʒɪkl; NAmE ˌɔːrnɪθəˈlɑːdʒ-/ adjective
••
WORD ORIGIN
late 17th cent.: from modern Latin ornithologia , from Greek ornithologos treating of birds.