volute

nouns

ornament consisting of a curve on a plane that winds around a center with an increasing distance from the center
spiral, volute
a structure consisting of something wound in a continuous series of loops
"a coil of rope"
coil, helix, spiral, volute, whorl

adjectives

in the shape of a coil
coiling, helical, spiral, spiraling, turbinate, volute, voluted, whorled