from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun Any of various thin circular echinoderms of the order Clypeasteroida, especially Echinarachnius parma, of coastal northern Atlantic and Pacific waters, having a covering of short movable spines.
  • noun The disklike internal skeleton of a sand dollar, having five radially symmetric oblong markings and often a pattern of long narrow holes.

from The Century Dictionary.

  • noun A flat sea-urchin, as Echinarachnius parma, or Mellita quinquefora; a cake-urchin.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun An echinoderm, of the order Clypeastroida, that has a flat, disk-shaped body with the mouth in a mid-ventral position, and lives in sand, on or near the surface

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun flattened disklike sea urchins that live on sandy bottoms


Sorry, no etymologies found.


    Sorry, no example sentences found.


Log in or sign up to get involved in the conversation. It's quick and easy.

  • any of numerous flat circular sea urchins (order Clypeasteroida) that live chiefly in shallow water on sandy bottoms

    January 25, 2008

  • I wonder what they call flat circular street urchins.

    January 25, 2008

  • There's a Christian legend about the sand dollar and its markings.

    January 25, 2008

  • Sionnach,

    Probably sand dollarless

    January 25, 2008

  • Haha! *picturing flat, circular street urchins*

    January 26, 2008