from the GNU version of the Collaborative International Dictionary of English
- n.pl. That division of the Mollusca which includes the bivalve shells, like the clams and oysters; -- so called because they have no evident head. Formerly the group included the Tunicata, Brachiopoda, and sometimes the Bryozoa. See mollusca.
from The Century Dictionary and Cyclopedia
- A term introduced by Cuvier into systematic zoölogy, and applied by him as a class name to a combination of the conchiferous lamellibranchiate mollusks and the tunicates.
- Same as Acrania.
- In Latreille's system of classification (1795), one of seven orders of the Linnean Aptera, containing the spiders, etc., corresponding to the Arachnides palpistes of Lamarck, and synonymous with Arachnida.
- In Haeckel's classification, a group of Mollusca composed of the Spirobranchia, or Brachiopoda, and the Lamellibranchia.
Sorry, no etymologies found.