Home › Words › R › roccellaroccellaroccella means any of a group of lichens of genus Roccella, especially Rocella tinctoria from which litmus is extracted.Among words judged in Lexicurio's Arena, roccella ranks #9,611 of 42,747 for Qualifying.EtymologyFrom the genus name.nounAny of a group of lichens of genus Roccella, especially Rocella tinctoria from which litmus is extracted.Definitions & examples from Wiktionary (CC BY-SA 3.0).Words closest in meaningBy meaning, not spelling — each word's AI semantic fingerprint, nearest first.roccellin 71% match — A red dyestuff, the sodium salt of a complex azo derivative of naphtol. vs roccella →orchil 66% match — Any of several lichens, especially those of the genera Roccella and Lecanora. vs roccella →lacmus 60% match — Litmus, orchil. vs roccella →orchilla 59% match — Orchil lichen. vs roccella →rochlederite 59% match — The resinous part of melanchyme. vs roccella →cistus 57% match — A rockrose; a plant of the genus Cistus. vs roccella →roquefortine 57% match — Any of a group of toxic alkaloids found in various fungi, particularly Penicillium species. vs roccella →parelle 55% match — A crustaceous lichen yielding orchil, cudbear, and litmus. vs roccella →