Megachiropteran lit up helicopter for me (as soon as he worte it means mega-bat) and chiro- naturally zing'd the word chiropractor. First guess was 'opter'/'opt

Megachiropteran lit up helicopter for me (as soon as he worte it means mega-bat) and chiro- naturally zing'd the word chiropractor. First guess was 'opter'/'opter' must have something to do with flight and the o is shared as a connective and it means 'bone-flying'. Wrong: turns out -pter is Latin for 'wing', and so we have helico(l)-pter (helix-wing) and our featherless friends are chiro-pter (hand-wing).