coexisting segment
Computing term for a memory segment that exists alongside others in a shared address space.
このOSでは、複数の共存セグメントが同じメモリ領域を共有できる。
In this OS, multiple coexisting segments can share the same memory area.
Compound of 共存 (coexistence) and セグメント (segment), a direct calque from English computing terminology.