Definition of monk's rhubarb in English:

monk's rhubarb

(also monks' rhubarb, monk's-rhubarb)

noun

  • Either of two species of dock formerly grown as medicinal plants or pot-herbs, (originally) patience dock, Rumex patientia, and (in later use) R. pseudoalpinus.

Origin

Late 16th century; earliest use found in William Langham (fl. 1597), doctor and herbalist. From the genitive of monk + rhubarb, after post-classical Latin Rhabarbarum Monachorum.

Pronunciation

monk's rhubarb

/ˌmʌŋks ˈruːbɑːb/