rhea: larger of two tall fast-running flightless birds similar to ostriches but three-toed; found from Brazil to Patagonia
animal: a living organism characterized by voluntary movement
plaster of paris: any of several gypsum cements; a white powder (a form of calcium sulphate) that forms a paste when mixed with water and hardens into a solid; used in making molds and sculptures and casts for broken limbs