sea-urchin (also urchin)

n small sea animal with a prickly shell 海胆.

sea power, sea shell, sea water, sea-bird, sea-borne, sea-bream, sea-breeze, sea-chest, sea-cow, sea-dog, sea-green, sea-horse, sea-island cotton, sea-kale, sea-legs, sea-level, sea-lion, sea-pink, sea-shore, sea-sick, sea-wall, sea-way, seabed, seaboard, seafarer, seafaring, seafood, seagoing, seagull, seal, sealant, sealed orders, sealing, sealing-wax, sealskin, Sealyham, seam, seaman, seamanlike, seamanship,