sand dollar

sand dollar

n.

1. 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.

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

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

sand dollar

n

(Animals) any of various flattened disclike echinoderms of the order Clypeasteroida, of shallow North American coastal waters: class Echinoidea (sea urchins)

Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

sand′ dol`lar

n.

any flat, disklike echinoderm of the order Clypeasteroidea, of the same class as sea urchins, living on sandy bottoms.

[1880–85, Amer.]

Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.

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

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