sand dollar

名词 n.
中文释义

英文释义

名词 n.
  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.
    — 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).

词形变化

sand dollars plural
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