Pronunciation: (on"un-dô'gu, -dä'-, -dā'-),[key] —n., —pl.-gas,(esp. collectively)-gafor 1. 1. a member of a tribe of Iroquoian Indians formerly inhabiting the region of Onondaga Lake.
2. the dialect of the Seneca language spoken by these Indians.
3. Lake, a salt lake in central New York. 5 mi. (8 km) long; 1 mi. (1.6 km) wide.