[floss] n [prob. modif. of F floche soft, weak (of silk fiber), fr. Gascon, fr. L fluxus, lit., loose, flowing, pp. of fluere to flow--more at fluid] (1759) 1 a: soft thread of silk or mercerized cotton for embroidery b: dental floss
2: fluffy fibrous material
[2]floss vt (1974): to use dental floss on ~ vi: to use dental floss