adj 1  :  having or constituting an isometric system < crystals>   2  :  conforming to what is usual or normal: as  a  :  recurring or functioning at fixed or normal intervals < bowel movements>   b  :  having menstrual periods or bowel movements at normal intervals <even the most woman may have her cycle go completely awry from time to time -A. F. Guttmacher & Joan Gould>  reg*u*lar*ly adv 
 
 
 
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