French, literally, stone debris, from Middle French roquailles, plural, rocky terrain, from roc rock, alteration of roche, from Vulgar Latin *rocca
circa 1810, in the meaning defined at sense 1
“Rocaille.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/rocaille. Accessed 4 Oct. 2023.
Britannica.com: Encyclopedia article about rocaille
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