Synonyms for Ringlet (same or very similar meaning)
WordNet sense 1 (a round shape formed by a series of concentric circles (as formed by leaves or flower petals)):
coil, curl, curlicue, roll, scroll, whorl, gyreWordNet sense 2 (a strand or cluster of hair):
lockWordNet sense 3 (any of various butterflies belonging to the family Satyridae):
ringlet butterflyFrom the ODE community, based on WordNetadd/edit