Filly
Pronunciation : Fil"ly
Part of Speech : n.;
Etymology : [Cf. Icel. fylia, fr. foli foal. See Foal.]
Definition : 1. (Zo?l.)
Defn: A female foal or colt; a young mare. Cf. Colt, Foal. Neighing in likeness of a filly foal. Shak.
2. A lively, spirited young girl. [Colloq.] Addison.
pl. Fillies.
Source : Webster's Unabridged Dictionary, 1913