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hormone (horŽmōn)   a chemical transmitter substance produced by cells of the body and transported by the bloodstream to the cells and organs on which it has a specific regulatory effect. Hormones act as chemical messengers to body organs, stimulating certain life processes and retarding others. Growth, reproduction, control of metabolism,sexual attributes, and even mental conditions and personality traits are dependent on hormones. adj., hormoŽnal., adj.




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