noun🔗Share棘皮動物An animal of the phylum Echinodermata, comprising radially symmetric, spiny-skinned marine animals including seastars, sea urchins, sea cucumbers, crinoids, and sand dollars."During our visit to the aquarium, we learned that echinoderms, like starfish and sea urchins, have a unique radial symmetry. "水族館への訪問中、ヒトデやウニのような棘皮動物が独特な放射状の対称性を持っていることを学びました。animalbiologyoceannatureChat with AIVocabulary GamePractice Reading