Emily Dickinson Lexicon

MOL-LUS'CA, or MOL-LUS'CAN, n. [A soft shelled nut, 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. Cuvier. Ed. Encyc.