|n. pl.||1.||(Zool.) An order of slender eel-like fishes having the gill openings confluent beneath the neck. The pectoral arch is generally attached to the skull, and the entire margin of the upper jaw is formed by the premaxillary. Called also Symbranchia.|
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.