adj 1  :  having a single phase : specif  :  relating to or being a record of a nerve impulse that is negative or positive but not both <a action potential>  <the flat record changed to a wave form of long latency -S. J. Larson et al>  - compare DIPHASICb POLYPHASIC1    2  :  having a single period of activity followed by a period of rest in each 24-hour period <humans are naturally beings>  .
 
 
 
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