Ripper, rip′ėr, n. a fog-horn.

Ripple, rip′l, n. the light fretting of the surface of water: a little curling wave.—v.t. to cause a ripple in.—v.i. to curl on the surface, as running water.—ns. Ripp′le-barr′el, a drum used in theatres; Ripp′le-grass, the rib-grass; Ripp′le-mark, a mark produced on sand at the bottom by the gentle flow of water: (geol.) the mark left on a sea-beach by receding waves, and left impressed on the surface of rocks.—adj. Ripp′le-marked.—ns. Ripp′let, a small ripple: rippling: an eddy; Ripp′ling, an eddy caused by conflicting currents or tides—also adj.adv. Ripp′lingly.—adj. Ripp′ly, rippling. [Variant of earlier rimple, A.S. hrimpan, to wrinkle, pa.p. hrumpen.]

Ripple, rip′l, v.t. to pluck the seeds from stalks of flax by drawing them through an iron comb.—n. the comb for rippling.—n. Ripp′ler, an apparatus for rippling flax. [Low Ger. repel, reppel, a ripple, hoe, Ger. riffel.]

Riprap, rip′rap, n. broken stones used for walls.

Ripsack, rip′sak, n. the Californian gray whale.

Rip-saw, rip′-saw, n. a hand-saw, with large but narrow-set teeth, for sawing timber lengthwise.

Ript=ripped. See Rip.

Ripuarian, rip-ū-ā′ri-an, adj. riparian.

Risaldar, ris-al-där′, n. the native commander of a troop of cavalry in the British Indian army.—n. Ris′ala, a troop of native irregular cavalry.

Risban, ris′ban, n. a piece of ground upon which a fort is constructed for defence of a post. [Fr.,—Ger. rissbank.]