os ‧ prey /ˈɒspreɪ $ ˈɑːspri, -preɪ/ BrE AmE noun [countable]
[ Date: 1400-1500 ; Origin: Probably from an unrecorded Old French osfraie , from Latin ossifraga 'sea eagle' , from os 'bone' + frangere 'to break' ]
a type of large bird that kills and eats fish