crottle | (n) any of several lichens of the genus Parmelia from which reddish brown or purple dyes are made, Syn. crotal, crottal |
crottle | n. see crottal. |
Crottles | n. pl. [ Gael. crotal. ] A name given to various lichens gathered for dyeing. See crottal. [ Scot. ] [ 1913 Webster ] |