Roc·​cel·​la | \ rōˈchelə \

Definition of Roccella

: 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

Love words?

You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

  • More than 250,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

Other Words from Roccella

roccelline \ -​elə̇n , -​eˌlīn \ adjective

History and Etymology for Roccella

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

Keep scrolling for more

Learn More about Roccella

Statistics for Roccella

Cite this Entry

“Roccella.” Dictionary, Merriam-Webster, Accessed 6 Apr. 2020.

Comments on Roccella

What made you want to look up Roccella? Please tell us where you read or heard it (including the quote, if possible).


See Definitions and Examples »

Get Word of the Day daily email!

Test Your Vocabulary

Name that Thing: Flower Edition

Spell It

Can you spell these 10 commonly misspelled words?

Dictionary Devil

Test Your Knowledge - and learn some interesting things along the way.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!