Entry 1 sense Webster, 1913 Ornithologic · Or·ni·tho·log·ic · IPA /ˌɔɹnɪθəˈlɑd͡ʒɪk/ 01 a. Of or pertaining to ornithology; as, her ornithological interests. 1. Of or pertaining to ornithology; as, her ornithological interests.