物ぶつ理り記き録ろく密みつ度どぶつりきろくみつどMeanings1nounphysical recording densitycomputing›Technical term used in computing and data storage to describe the amount of data that can be stored per unit area or length on a physical medium.ハードディスクの物ぶつ理り記き録ろく密みつ度どは