cyrt-
combining form 
or cyrto-
Etymology: New Latin, from Greek kyrt-, kyrto-, from kyrtos bulging, convex; akin to Latin curvus curved — more at crown 
 : bent : curved 
< cyrtopia >
< cyrtostyle >
: something curved
< cyrtometer >
or cyrto-
< cyrtopia >
< cyrtostyle >
: something curved
< cyrtometer >