• Webster's Revised Unabridged Dictionary
    • n Birrus A coarse kind of thick woolen cloth, worn by the poor in the Middle Ages; also, a woolen cap or hood worn over the shoulders or over the head.
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Century Dictionary and Cyclopedia
    • n birrus Under the Roman empire, and later, a cloak with a hood worn as an outer garment for protection from the weather. It was strictly a heavy and rough garment, woven of coarse wool in its natural color; but after a time cloaks of the same form and name came to be made of fine quality also.
    • n birrus A species of coarse thick woolen cloth used by the poorer classes in the middle ages for cloaks and external clothing.
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Webster's Revised Unabridged Dictionary
LL., fr. L. birrus, a kind of cloak. See Berretta