Definitions
American Heritage® Dictionary of the English Language, Fourth Edition
- n. 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.
- n. The disklike internal skeleton of a sand dollar, having five radially symmetric oblong markings and often a pattern of slotlike holes.
Century Dictionary and Cyclopedia
- n. A flat sea-urchin, as Echinarachnius parma, or Mellita quinquefora; a cake-urchin. The fishermen on the coast of Maine and New Brunswick sometimes prepare a marking-ink from sand-dollars, by rubbing off the spines and skin, and, after pulverizing, making the mass into a thin paste with water. See placenta, Scutellidæ, shield-urchin, and cuts under Encope, cake-urchin, and sea-urchin.
Wiktionary
- n. 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
GNU Webster's 1913
- n. any one of several species of small flat circular sea urchins, which live on sandy bottoms, especially Echinarachnius parma of the American coast.
WordNet 3.0
- n. flattened disklike sea urchins that live on sandy bottoms
Examples
“For his part, Eli attempted the defense that every afflicted and hunted beast attempts, the defense of a sand dollar that settles into the ocean floor or a beaten dog that cowers beneath his forepaws, the worthless twin defenses of shrinkage and anonymity.”
Land of the Blind
Lists
These user-created lists contain the word ‘sand dollar’.
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Sand
A nitty-gritty list for words containing sand-, -sand-, or -sand; and apropos terms and phrases. Your contributions are welcome.
sand-blast, sand-jet, greensand, sandpaper, sandlot, sandstorm, sandbar, sandbag, sandwich, sandwort, Cassandra, sandhog and 213 more...
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Fashion Colors
Names of colors in fashion and advertising
periwinkle, oxblood, mauve, avocado, pink mist, cobalt, sage green, daiquiri green, rococco red, neon yellow, maize, pastel mint and 59 more...
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ptssssssss
uemph
sandcastle, for all to see, but, mostly, them, if they wish, sorta hope, maybe, pop-up, snap, gotcha, cause then i have... and 20 more...

reesetee Haha! *picturing flat, circular street urchins* Jan 25, 2008
treeseed Sionnach,
Probably sand dollarless Jan 25, 2008
treeseed There's a Christian legend about the sand dollar and its markings. Jan 25, 2008
sionnach I wonder what they call flat circular street urchins. Jan 25, 2008
treeseed any of numerous flat circular sea urchins (order Clypeasteroida) that live chiefly in shallow water on sandy bottoms Jan 25, 2008