Entry 1 sense Webster, 1913 Parella /pär-ĕl'-ə/ · Pa·rel·la · IPA /pɑrˈɛlə/ 01 n. A name for two kinds of dock (Rumex Patientia and Rumex Hydrolapathum). 1. A name for two kinds of dock (Rumex Patientia and Rumex Hydrolapathum).(Bot.)