pleonasm (n.) Look up pleonasm at Dictionary.com
"redundancy in words," 1580s, from Late Latin pleonasmus, from Greek pleonasmos, from pleonazein "to be more than enough, to be superfluous," in grammatical use, "to add superfluously," from comb. form of pleon "more" (from PIE root *pele- (1) "to fill").