n 1  :  the act of regulating : also  :  the resulting state or condition  2 a  :  the process of redistributing material (as in an embryo) to restore a damaged or lost part independent of new tissue growth - compare REGENERATION2    b  :  the mechanism by which an early embryo maintains normal development  3  :  the control of the kind and rate of cellular processes by controlling the activity of individual genes .
 
   
 
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