ダイヤモンドダストalso: ダイアモンドダストダイヤモンドダストMeanings1noundiamond dust; ice crystalsMeteorological term for tiny ice crystals suspended in the air, often glittering in sunlight. Also called 細氷 (さいひょう).See also: 細氷冬ふゆの朝あさ、空くう気き中ちゅうにダイヤモンドダストが