separating something into fine particles何かを細かい粒子に分けること微粒化
(computer science) the condition of a file that is broken up and stored in many different locations on a magnetic disk; "fragmentation slows system performance because it takes extra time to locate and assemble the parts of the fragmented file"ファイルが分散させられ、磁気ディスク上の様々な場所に蓄積されている状態断片化