coprocessor

/ˌkəʊˈprəʊsɛsə/
noun
1.
(computing) a microprocessor circuit that operates alongside and supplements the capabilities of the main processor, providing, for example, high-speed arithmetic
coprocessor in Science
coprocessor
  (kō'prŏs'ěs-ər)   
A microprocessor distinct from the central processing unit. A coprocessor performs specialized functions that the central processing unit cannot perform or cannot perform as well and as quickly.
coprocessor in Technology


Any computer processor which assists the main processor (the "CPU") by performing certain special functions, usually much faster than the main processor could perform them in software. The coprocessor often decodes instructions in parallel with the main processor and executes only those instructions intended for it.
The most common example is a floating point coprocessor (or "FPU"), others are graphics and networking.
(1995-01-05)