seashell

noun

The hard outer covering left behind by a sea creature such as a clam or snail.

Example sentence

“The children spent the morning collecting seashells along the beach.”

Star of the classic tongue twister: 'she sells seashells by the seashore'.

Related words

seaweedA plant-like organism, such as kelp, that grows in the sea.coralA small sea animal of the class Anthozoa that lives in colonies and usually builds a hard chalky skeleton; also the colony such animals form.tundraA cold, flat Arctic landscape where no trees grow.reefA ridge of rock, coral, or sand lying just below or at the surface of the sea.savannaA hot grassland ecosystem with scattered trees whose tops do not form a closed canopy.geyserA natural hot spring that regularly shoots columns of steam and boiling water into the air.