
1) Barley decoction 2) Barley water
Found on
https://www.crosswordclues.com/clue/ptisan

• (n.) A decoction of barley with other ingredients; a farinaceous drink. • (n.) An aqueous medicine, containing little, if any, medicinal agent; a tea or tisane.
Found on
http://thinkexist.com/dictionary/meaning/ptisan/
Ptis'an noun [ Latin
ptisana peeled barley, barley water, Greek ..., from ... to peel, husk; confer French
ptisane ,
tisane .]
1. A decoction of barley with other ingredients; a farinaceous drink.
2. (Medicine) An aqueous medicine, containing little, if any,...
Found on
http://www.encyclo.co.uk/webster/P/189

a nourishing decoction, originally one made from barley, purported to have medicinal quality.
Found on
https://www.infoplease.com/dictionary/ptisan
No exact match found.