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rattlesnake a venomous pit viper of the Americas that has a segmented structure at the end of its tail which vibrates with a rattling sound.
rattlesnake plantain any of several ground orchids with mottled leaves, found in northern climates.
rattlesnake root any of various plants whose bitter roots or tubers have been thought to cure snakebite.
rattlesnake weed a plant of eastern North America, having purple-veined leaves at the base of its stem and bearing yellow flowers.
rattletrap an unstable, rickety, rattling object, esp. a run-down automobile.
rattling that rattles. [3 definitions]
rattrap a device for catching and killing rats. [2 definitions]
ratty tattered and worn. [3 definitions]
raucous loud, sharp, and rasping, as, at times, a bird's call or a human's voice or laugh. [2 definitions]
raunchy (informal) low in quality, appearance, or the like; careless; sloppy; cheap. [2 definitions]
rauwolfia any of various poisonous tropical trees and shrubs of the dogbane family. [2 definitions]
ravage to damage or destroy, as by violent action. [4 definitions]
rave to praise something extravagantly; express enthusiasm. [3 definitions]
ravel to cause to be tangled or unclear. [4 definitions]
raveling a thread pulled from a piece of cloth.
raven1 a large black crowlike bird with glossy feathers and a croaking call. [2 definitions]
raven2 to eat greedily; devour. [4 definitions]
ravening searching greedily for prey; rapacious. [2 definitions]
ravenous extremely hungry; famished; starved. [3 definitions]
ravin see raven2.
ravine a deep, steep-sided cut in the land, esp. one carved by the flow of water.