noun
ice nucleus; ice nucleating particle; INP
Technical term in meteorology for a particle that serves as a nucleus for ice crystal formation in clouds.
氷晶核がなければ、雲の中で氷の結晶はなかなか成長しない。
Without ice nuclei, ice crystals do not readily grow in clouds.
Compound of 氷晶 (ice crystal) and 核 (nucleus).