Other forms: whorls
Whorl describes something that looks like loops — a strand of curly hair that boings back up when you pull in then let it go, a corkscrew, even the track of a roller coaster that spins you in every direction.
Use whorl to describe a thing that swirls or curls — the loops of icing on a birthday cake, the spiral curves of a mountain road, or a lock of curly hair. Whorl is also a good word to describe a flower whose petals form layer after layer of circles. Don't confuse the noun whorl with its homophone whirl, a verb that means "to spin in a circle."