: a genus (the type of the family Roccellaceae) of chiefly maritime rock-inhabiting lichens that have a fruticulose or pendulous thallus and include some (especially Roccella tinctoria) which are the chief sources of the dye archil and some which furnish litmus compare lecanora, pertusaria

Word History


New Latin, from Italian, archil (plant), alteration of oricello

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Dictionary Entries Near Roccella

Cite this Entry

“Roccella.” Dictionary, Merriam-Webster, Accessed 1 Mar. 2024.

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