noun🔗Shareウミユリ類One of the numerous animals that make up the class Crinoidea; the feather stars or sea lilies."While diving, the marine biologist pointed out several crinoids attached to the coral reef, their feathery arms waving gently in the current. "ダイビング中、海洋生物学者はサンゴ礁に付着したいくつかのウミユリ類を指し示し、その羽のような腕が穏やかに流れに揺れていました。animalbiologyoceanChat with AIVocabulary GamePractice Reading