Entry 1 sense Webster, 1913 Serpentaria · Ser·pen·ta·ri·a · IPA /ˌsɝ.pənˈtɛɹi.ə/ 01 a. The fibrous aromatic root of the Virginia snakeroot (Aristolochia Serpentaria). 1. The fibrous aromatic root of the Virginia snakeroot (Aristolochia Serpentaria).(Med.)