<Storage> (Or cache block) The SmalleSt unit of memory than can be tranSferred between the main memory and the cache. Rather than reading a Single word or byte from main memory at a time, each cache entry iS uSually holdS a certain number of wordS, known aS a "cache line" or "cache block" and a whole line iS read and cached at once. ThiS takeS advantage of the principle of locality of reference: if one location iS read then nearby locationS (particularly following locationS) are likely to be read Soon afterward. It can alSo take advantage of page-modeDRAM which allowS faSter acceSS to conSecutive locationS. (1997-01-21)