凝ぎょう結けつ核かく

noun

condensation nucleus

Technical term in meteorology for a particle that serves as a surface for water vapor to condense upon, forming cloud droplets.

• 雲くもができるには、大たい気き中ちゅうに凝ぎょう結けつ核かくが必ひつ要ようです。

  Condensation nuclei in the atmosphere are necessary for clouds to form.