Of, relating to, or belonging to the genus Buteo or the subfamily Buteoninae of hawks.
From 'Buteo' (the hawk genus) plus '-ine', a suffix meaning 'of or relating to' (similar to feline, bovine, serpentine). The '-ine' comes from Latin '-inus'.
Zoologists use '-ine' to create adjectives about animal groups: feline (cat-like), equine (horse-related), buteonine (hawk-related). It's the same suffix used to describe chemical properties!
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