[av-uh n-teyl]
noun Armor.
  1. Also called camail. a mail tippet suspended from the lower edges of a 14th-century basinet as a protection for the neck, throat, and shoulders.
  2. ventail.

Origin of aventail

1300–50; Middle English < Anglo-French aventaille, equivalent to a- (< ?) + ventaille ventail
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018