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Klockner Elementary School

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radical	having to do with the root or source; basic; fundamental. [4 definitions]
radii	a plural of "radius."
radio	a way of sending signals made of waves that travel through the air. These radio waves are picked up and translated into sounds by electronic devices. [3 definitions]
radioactive	giving off energy as a result of the decay of unstable atoms.
radioactivity	the giving off of energy as a result of the decay of unstable atoms.
radish	a plant that has a crisp and strong-tasting root. [2 definitions]
radium	a silver-white, radioactive metal that is one of the chemical elements. Radium glows in the dark. It is used to treat cancer. (symbol: Ra)
radius	a straight line from the center to the edge of a circle or sphere. [2 definitions]
radon	a radioactive gas that is one of the chemical elements. It is found in small amounts in some soils and rocks. (symbol: Rn)
raffle	a game in which the person who has bought the ticket that is drawn wins a prize. [2 definitions]
raft¹	a flat platform made of materials that can float, such as wood or barrels filled with air. Rafts are often used to carry people or goods. [3 definitions]
rag¹	a scrap or small piece of cloth. [2 definitions]
rag²	(informal) to tease or scold.
rage	extreme anger; fury. [3 definitions]
ragged	worn down into rags; torn. [4 definitions]
ragtime	a form of music developed in the late nineteenth and early twentieth century in America. Ragtime was a popular kind of music with a bouncy rhythm, usually written for the piano.
ragweed	a weed that produces a large amount of pollen in the fall. Many people are allergic to ragweed.
raid	a sudden, surprise attack. [3 definitions]
rail¹	a bar of wood or metal that runs between two posts and serves as a fence or barrier. [3 definitions]
railing	a barrier or fence made of posts and rails. [2 definitions]
railroad	a road of steel rails upon which train cars travel. [2 definitions]

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