ツノモ

noun

dinoflagellate of genus Ceratium

A type of marine plankton; the name refers to the horn-like shape. Usually written in katakana in biological contexts.

• ツノモは海かい水すい中ちゅうに広ひろく分ぶん布ぷする渦うず鞭べん毛もう藻そうの一いっ種しゅだ。

  Tsunomo is a type of dinoflagellate widely distributed in seawater.

• 顕けん微び鏡きょうでツノモの特とく徴ちょう的てきな角かく状じょうの殻からを観かん察さつした。

  I observed the characteristic horn-shaped shell of Tsunomo under a microscope.