1. Flattened disklike sea urchins that live on sandy bottoms

Derived forms: sand dollars

Type of: sea urchin, urchin

Part of: Exocycloida, order Exocycloida

Encyclopedia: Sand dollar

• safety hat
• safety island
• safety isle
• safety lamp
• safety lock
• safety margin
• safety match
• safety net
• safety nut
• safety pin
• safety rail
• safety razor
• safety squeeze
• safety squeeze play
• safety valve
• safety zone
• safety-deposit
• safety-related
• safflower
• safflower oil
• safflower seed
• saffranine
• saffron
• saffron crocus
• safranin