double-bottom

double-bottom [duhb-uh l-bot-uh m] Examples noun

1. tandem trailer(def 1).

Examples from the Web for double-bottom Historical Examples of double-bottom

This “double-bottom,” also called a “sluiceboat” or “cylinder,” was later lengthened at the stern to make her 30 feet overall.

Smithsonian Institution – United States National Museum – Bulletin 240

Anonymous