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Nov 30, 2009
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pho•to•chem•is•try



Pronunciation: (fō"tō-kem'u-strē), [key]
—n.
the branch of chemistry that deals with the chemical action of light.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

photochemical smogphotochromic
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