CIDE DICTIONARY
ruche, n. [F. ruche ruche, beehive, OF. rusche a beehive, which was formerly made of the bark of trees; cf. W. rhisg, rhisgl, bark, gael. rusg bark, rind.].
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A plaited, quilled, or goffered strip of lace, net, ribbon, or other material, -- used in place of collars or cuffs, and as a trimming for women's dresses and bonnets. [1913 Webster]
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A pile of arched tiles, used to catch and retain oyster spawn. [1913 Webster]
THESAURUS
ruche
crease, creasing, crimp, dog-ear, double, doubling, duplicature, flection, flexure, flounce, fold, frill, gather, lapel, lappet, plica, plication, plicature, ply, ruching, ruffle, tuck