physical address

In computers, a physical address or binary address is the value of the finite monotonically ordered binary number presented on the computer's main memory control structure called a computer address bus which is used electronically by the circuitry to directly enable a particular memory storage cell (itself part of the circuitry) using other boolean logic circuitry, the Memory Management Unit (MMU). It is distinct from a memory address only in that the term "Memory address" in practice include both virtual and physical addresses.
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<memory management> The address presented to a computer's main memory in a virtual memory system, in contrast to the virtual address which is the address generated by the CPU. A memory management unit translates virtual addresses into physical addresses.
(1995-03-31)

<networking> The low level addressing scheme used on Ethernet. The 48-bit destination Ethernet address in a packet is compared with the receiving node's Ethernet address.
Compare Internet address.
(1994-12-23)