twenty
Cross references: 1. number twen.ty \'twent-e-\ n [ME, fr. twenty, adj., fr. OE twe-ntig, n., group of 20, fr. ]twe-n- (akin to OE twa- two) + -tig group of 10 - more at TWO, EIGHTY pl 2: the numbers 20 to 29 inclusive; specif : the years 20 to 29 in a lifetime or century 3: a twenty-dollar bill - twenty ajor ;pn