echinoderms
Definition
plural noun. a group of marine animals with spiny skin and a hard skeleton. they include sea stars and sea urchins.
Example Sentence
Echinoderms are a group of marine animals that include starfish and sea urchins.
More Example Sentences
Echinoderms often live on the ocean floor.
Synonyms
sea star; sea urchin; starfish
Antonyms
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echinoderms
