COLUMBIAD

Co‐lum″bi‐ad (?), n. [[From Columbia the United States.]] (Mil.) A form of seacoast cannon; a long, chambered gun designed for throwing shot or shells with heavy charges of powder, at high angles of elevation. ☞ Since the War of 1812 the Columbiad has been much modified, especially by General Rodman, and the improved form now used in seacoast defense is often called the Rodman gun.