chemical change

chemical change

noun
Chemistry. a usually irreversible chemical reaction involving the rearrangement of the atoms of one or more substances and a change in their chemical properties or composition, resulting in the formation of at least one new substance: The formation of rust on iron is a chemical change.
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Based on the Random House Dictionary, © Random House, Inc. 2012.
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Chemical change is always a great word to know.
So is slumgullion. Does it mean:
a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.
a stew of meat, vegetables, potatoes, etc.
Dictionary.com's 21st Century Lexicon
Main Entry:  chemical change
Part of Speech:  n
Definition:  any change from one state (gas, liquid, solid) which is accompanied by alteration of the chemical composition; any process in which one or more substances are changed into one or more different substances; cf. physical change
Main Entry:  chemical change
Part of Speech:  n
Definition:  See physical change
Dictionary.com's 21st Century Lexicon
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