cnidarian
(zoology) Any of various invertebrate animals, such as jellyfish, hydras, sea anemones, corals and formerly sponges and ctenophores that belong to the phylum Cnidaria.
(transitive, idiomatic) To overreact to or overstate; to treat too seriously or be overly concerned with.
(UK, music) A sixty-fourth note.
(astronomy) A unit of zodiacal dust, equal to the amount of interplanetary dust in the inner solar system, which absorbs light and re-radiates it with a luminosity about 10⁻⁷ that of the sun.
海洋生物学者はその行動を記録するために、サンゴ礁に付着している刺胞動物を注意深く撮影した。
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