Ptis"an (?), n. [L. ptisana peeled barley, barley water, Gr. , from to peel, husk; cf. F. ptisane, tisane.]
1.
A decoction of barley with other ingredients; a farinaceous drink.
2. Med.
An aqueous medicine, containing little, if any, medicinal agent; a tea or tisane.
© Webster 1913.