0 a flat type of sea urchin (= a small sea creature with a round shell covered with sharp points) that lives partly in sand below the surface of the water. The outer skeletons (= the bony frame supporting the body) of dead sand dollars are often found on beaches:
Sand dollars are often easy to find along the high tide line.
Living sand dollars are covered with velvety, purple spines used to grab food particles.
A wreath on the front door was decorated with sand dollars and starfish.
