/bee"gah, -geuh, buy"-/ , n. , pl. bigae /-gee, -jee, -guy/ . Class. Antiq.
a two-wheeled chariot drawn by two horses harnessed abreast. Cf. quadriga, triga .
[ 1840-50; biga, bigae, for * biiuga ( bi- BI- 1 + iug ( um ) YOKE + -a fem. nom. sing. ending) ]