What is 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 called?

quirboilly — 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. (Webster's 1913.)