also  ep*i*dem*i*cal  adj 1  :  affecting or tending to affect an atypically large number of individuals within a population, community, or region at the same time <typhoid was >  - compare ENDEMIC SPORADIC   2  :  of, relating to, or constituting an epidemic <coronary disease … has hit proportions -Herbert Ratner>  ep*i*dem*i*cal*ly adv 
, n 1  :  an outbreak of epidemic disease  2  :  a natural population (as of insects) suddenly and greatly enlarged .
 
 
 
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