Parella
Pronunciation : Pa*rel"la, Pa`relle
Part of Speech : n.
Etymology : [Cf. F. parelle.] (Bot.) (a) A name for two kinds of dock (Rumex Patientia and R. Hydrolapathum). (b) A kind of lichen (Lecanora parella) once used in dyeing and in the preparation of litmus.
Source : Webster's Unabridged Dictionary, 1913