noun ダウンロード 🔗共有 珪藻 Any of a group of minute unicellular algae having a siliceous covering of great delicacy, now categorized as class Diatomophyceae or division Bacillariophyta. Examples : "The scientist studied the intricate, glass-like shell of the diatom under a microscope. " 科学者は顕微鏡で珪藻の複雑でガラスのような殻を研究した。 organism nature biology plant microorganism ecology ocean environment science AIとチャット語彙ゲーム読解練習