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molluscaMOLLUS'CA, n. [from L. mollis, soft.] In zoology, a division or class of animals whose bodies are soft, without an internal skeleton, or articulated covering. Some of them breathe by lungs, others by gills; some live on land, others in water. Some of them are naked; others testaceous or provided with shells. Many of them are furnished with feelers or tentacula. |