Definition of "crownlike"

Lot 28 at Sotheby’s is a 21-inch-tall bronze Tyche, late Hellenistic or Roman, about first century B.C. to 1st century A.D. She is standing, with a crownlike diadem resting on top of her curly hair.

2008 May 30, Wendy Moonan, “Chateau’s Monkey Room Is Lovingly Restored”, in New York Times‎