n. 冕状头饰

[ noun ]
a jeweled headdress worn by women on formal occasions
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Tiara \Ti*a"ra\, n. [L., from Gr. ?, ?; of Persian origin.]
1. A form of headdress worn by the ancient Persians.
According to Xenophon, the royal tiara was encircled with
a diadem, and was high and erect, while those of the
people were flexible, or had rims turned over.

2. The pope's triple crown. It was at first a round, high
cap, but was afterward encompassed with a crown,
subsequently with a second, and finally with a third.
Fig.: The papal dignity.