We found 2 definitions of crottle from 2 different sources.
NounPlural: crottles |
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crottle - any of several lichens of the genus Parmelia from which reddish brown or purple dyes are made | ||
crottal, crotal | ||
lichen any thallophytic plant of the division Lichenes; occur as crusty patches or bushy growths on tree trunks or rocks or bare ground etc. |