[roh-kahy; Frenchraw-kah-yuh] /roʊˈkaɪ; French rɔˈkɑ yə/
noun
1.
Fine Arts. any of the fantastic ornamental, often asymmetrical, combinations characteristic of the Rococo period, consisting of rock, shell, and plant forms combined with artificial forms, esp C -curves.
Origin
1855-60; < French: pebble-work, derivative of rocrock1
British Dictionary definitions for rocaille
rocaille
/rɒˈkaɪ/
noun
1.
decorative rock or shell work, esp as ornamentation in a rococo fountain, grotto, or interior