tisane noun. [tɪ'zan] Also (now rare or obsolete) ptisan, ptisane. LME.
[Old & mod. French tisane, ptisane, from Latin (p)tisana from Greek ptisanē peeled barley, barley-water, rel. to ptissein peel.]
A wholesome or medicinal drink or infusion, orig. spec. made with barley; now (esp.), a herbal tea.

► The spelling pt- arose in E16 and was common in 17. The word became rare until reintroduced from French.

[TahlilGaran] English Dictionary ▲