The Collaborative International Dictionary
Parelle
Parella \Pa*rel"la\, Parelle \Pa`relle\, n. [Cf. F. parelle.] (Bot.)
A name for two kinds of dock ( Rumex Patientia and Rumex Hydrolapathum).
A kind of lichen ( Lecanora parella) once used in dyeing and in the preparation of litmus.