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re-press
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re-sort
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reach
react
reactance
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reactant
re·ac·tant [ ree áktənt ] (plural re·ac·tants)


noun 
Definition:
 
substance undergoing chemical reaction: a substance that reacts with another in a chemical reaction
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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