rotation twinrotational cylindroidal foldrotational fault or fault or faultrotational landsliderotational sliderotational slip failurerotational slumprotational strainrotational wave or s wave or s waverotative beam enginerotliegenderotoreflection axisrotten icerotten spot or pothole or potholerottenstonerotula or rotulae or rotulaerouaiteroubaultiterougemoniteroughrough criterionrough icerough operationrough searougher flotationroughneckroughnessroughness coefficientroundround trip travel timeroundedrounded crest weirrounded formroundhead buttress damroundingroundnessroundness class or roundness or roundnessroundstonerouseiteroustaboutrouthieriteroutineroutivariterouvilleiterouvilliterouxeliteroweiterowlanditeroxbyiteroyal agate
