cnidarian
(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.
(zoology) Any of various invertebrate animals, such as jellyfish, hydras, sea anemones, corals and formerly sponges and ctenophores that belong to the phylum Cnidaria.
(UK, music) A sixty-fourth note.
(transitive, idiomatic) To overreact to or overstate; to treat too seriously or be overly concerned with.
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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