अभव्यहंसabhavyahaṃsam. a swan as it ought not to be (i.e. with black wings) L.
masculine gender a swan as it ought not to be (id est with black wings) Lexicographers
कोशःDictionaries
Every entry for a word in Apte, Monier-Williams, Macdonell and the Dhātupāṭha, with their abbreviations spelled out, and an analysis of its forms.