Our online medical glossary of medical terms and definitions includes definitions for terms related to treatment, and general medicine
Origin: Cf. Icel. Fylia, fr. Foli foal. See Foal.
1. A femalefoal or colt; a young mare. Cf. Colt, Foal. "Neighing in likeness of a filly foal." (Shak)
2. A lively, spirited young girl.
Source: Websters Vocabulary