Rundlet \Rund"let\, n. [Dim. of OF. rondele a little tun, fr. rond round. See {Round}, and cf. {Roundlet}, {Runlet}.] A small barrel of no certain dimensions. It may contain from 3 to 20 gallons, but it usually holds about 141/2 gallons. [Written also {runlet}.] [1913 Webster]