Webster's English Dictionary

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percoid

per.coid also per.coi.de.an \'p*r-.ko.id\ \.p*r-'ko.id-e--*n\ aj [deriv. of 
   L perca perch] : of or relating to a very large suborder (Percoidea) of 
   spiny-finned fis hes including the true perches, sunfishes, sea basses, and 
   sea breams - percoid n