粒りゅう子し径けいMeanings1nounparticle size; particle diameterTechnical term used in physics, chemistry, and materials science. Often interchangeable with 粒径 (りゅうけい).See also: 粒径この粉ふん体たいの平へい均きん粒りゅう子し径けいは約やく50マイクロメートルです。The average particle size of this powder is about 50 micrometers.
