ro·caille 
(rō-kī)
(rō-kī)n.
1. A style of decorative art associated with the rococo and characterized by intricate rock, shell, and scroll motifs.
2. Decorative rockwork, often incorporating these motifs.
[French, rock fragments, rocaille, from Old French, rocky ground : roc, rock; akin to roche, rock (from Vulgar Latin *rocca) + -aille, collective and pejorative suff. (from Latin -ālia, neuter pl. of -ālis, adj. suff.)]