nounprŏ-ăvuncŭlusPRO-AVVNCVLVS☆ KeepMeaninga great-grandmother's brotherLewis & Short 1879ModernAs printed, 1879PROAVUNCULUSLEWIS & SHORTPROAVUNCULUSprŏ-ăvuncŭlus, i, m., I. a great-grandmother's brother, Dig. 38, 10, 1; 10.Read the whole entry