細さい氷ひょうさいひょうMeanings1nounice crystals; diamond dustMeteorological term for tiny ice crystals suspended in the air, often seen in very cold weather. Also known as diamond dust.厳げん冬とう期きの朝あさ、細さい氷ひょうがキラキラと輝かがやいていた。On a midwinter morning, diamond dust glittered in the air.