Wikipedia
Cidaris
Cidaris is a genus of pencil sea urchins.
Usage examples of "cidaris".
He wore the cidaris, a high round felt hat that only the Great King and the crown prince may wear.
At the base of the cidaris, Darius wore the blue-and-white fillet of sovereignty that had belonged to Cyrus and before him to the ten successive kings of Media.
On his head was the high felt cidaris circled by Cyrus’ blue-and-white fillet.