sand dollar

English

A sand dollar, Mellita quinquiesperforata

Noun

sand dollar (plural sand dollars)

1. Any echinoderm of the order Clypeasteroida, having a flat, disk-shaped body with the mouth in a mid-ventral position, and living in sand, on or near the surface.
   • 1987, John M. Lawrence, chapter I, in A Functional Biology of Echinoderms‎^[1], page 75:

     In the sand dollars, the arrangement of the food grooves and consequently the lateral water vessels and their accessory tube feet is more complex (Phelan 1977).

   • 2000, Sandra Alters, chapter I, in Biology: Understanding Life‎^[2], page 692:

     Adult echinoderms have a five-part body plan corresponding to the arms of a sea star or the design on the "shell" of a sand dollar.

   • 2001, Jennifer Hahn, Spirited Waters: Soloing South Through the Inside Passage, published 2009, page 135:

     If you look carefully, a sand dollar is merely a sea urchin in flattened form.

Synonyms

• (any species of Clypeasteroida): clypeasteroid, sand cookie

Derived terms

• Bahamian sand dollar
• eccentric sand dollar
• keyhole sand dollar

 

Translations

any echinoderm of the order Clypeasteroida

• Chinese:

  Mandarin: 沙錢／沙钱 (zh)

• Finnish: hietadollari
• Italian: riccio (it) m, riccio di mare m
• Portuguese: bolacha-da-praia (pt) f
• Spanish: dólar de arena m