sand dollar

sand dollar

n.

1. Any of various thin circular echinoderms of the class Echinoidea, especially Echinarachnius parma, of coastal northern Atlantic and Pacific waters, having a covering of short movable spines.

2. The disklike internal skeleton of a sand dollar, having five radially symmetric oblong markings and often a pattern of slotlike holes.

Thesaurus

Noun

1.

sand dollar - flattened disklike sea urchins that live on sandy bottoms sea urchin - shallow-water echinoderms having soft bodies enclosed in thin spiny globular shells Exocycloida, order Exocycloida - flat sea urchins