1) Belgian 
• (a.) Of or pertaining to the Belgae, a German tribe who anciently possessed the country between the Rhine, the Seine, and the ocean. • (a.) Of or pertaining to the Netherlands or to Belgium.
Bel'gic adjective [ Latin Belgicus , from Belgae the Belgians.] 1. Of or pertaining to the Belgæ , a German tribe who anciently possessed the country between the Rhine, the Seine, and the ocean. « How unlike their Belgic sires of old. Goldsmith. �...
of or pertaining to the Belgae. · Belgian.