(sports, American football) Initialism of Xtreme Football League. / (sports, American football) Initialism of Extreme Football League.

A bird of the order of Struthioniformes, a diverse group of large running, flightless birds, mostly extinct, but including the cassowary, elephant bird, emu, kiwi, moa, ostrich, rhea and tinamou

(biochemistry) A peptide that is derived from part of a larger one

plural of aia