Definify.com

Webster 1913 Edition

Noun.

[OE.

cuir bouilli

Leather softened by boiling so as to take any required shape. Upon drying, it becomes exceedingly hard, and hence was formerly used for armor.

[Obs.]

“His jambeux were of quyrboilly.”

Chaucer.

quirboilly ‎(uncountable)

(obsolete, Chaucer) Leather softened by boiling and shaped before it hardens, formerly used for armour.