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Tudor bonnet

American  
[too-der bahn-it] / ˈtu dər ˌbɑn ɪt /

noun

plural

Tudor bonnets
  1. a round, flattish or floppy cap with a narrow brim, made of soft fabric and decorated just above the brim with an encircling cord from which a tassel usually hangs. Originally a popular English head covering during the Tudor period, the Tudor bonnet forms part of academic dress at some universities, especially at the doctoral level.