From Longman Dictionary of Contemporary Englishpentathlonpen‧tath‧lon /penˈtæθlən/ noun [singular, uncountable] DSOa sports event involving five different sports
Examples from the Corpus
pentathlon• He came into pentathlon through swimming, his strongest event - and is still struggling with the fencing.• There are newly available seats for two extra sessions of volleyball and individual portions of the five-sport modern pentathlon.• However, when urine specimens were screened there were several positives in the modern pentathlon contest.• Thus, there are the five events of the pentathlon.• But one thing de Courbertin certainly never fathomed when he was thinking up the pentathlon was its television appeal.Origin pentathlon (1600-1700) Greek penta- (PENTA-) + athlon “competition” 