Crossword clue: a round shape formed by a series of concentric circles (as formed by leaves or flower petals)

The most common answer is gyre (4 letters).

2 answers found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

Possible answers

gyre 4 letters wn-def

a round shape formed by a series of concentric circles (as formed by leaves or flower petals)

whorl 5 letters wn-def

a round shape formed by a series of concentric circles (as formed by leaves or flower petals)