Scutibranchiata
Scu`ti`bran`chi`a´ta
n. pl. | 1. | (Zool.) An order of gastropod Mollusca having a heart with two auricles and one ventricle. The shell may be either spiral or shieldlike. |
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.