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Dictionary


sec'ond mes'senger



Biochem.
any of various intracellular chemical substances, as cyclic AMP, that transmit and amplify the messages delivered by a first messenger to specific receptors on the cell surface. Cf. first messenger.

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

secondmentsecond mortgage

 

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