crottle
/ˈkrɒtl/(亦作crotal)
noun
1- a common lichen found on rocks, used in Scotland to make a golden-brown or reddish-brown dye for staining wool for making tweed石梅衣。
1.1
- Parmelia saxatilis (order Parmeliales) and other species.拉丁名Parmelia saxatilis（梅衣目）及其他种。
词源
mid 18th cent.: from Scottish Gaelic and Irish crotal, crotan.