from the GNU version of the Collaborative International Dictionary of English
- n.pl. An order of gastropod Mollusca having a heart with two auricles and one ventricle. The shell may be either spiral or shieldlike.
from The Century Dictionary and Cyclopedia
- n. In De Blainville's classification (1825), the second order of his Paracephalophora hermaphrodita, divided into the two families Otidea and Calyptracea, or the ear-shells and various limpet-like shells. See cuts under abalone and sea-ear.
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