A cyborg is a being with both biological and artificial (e.g. electronic, mechanical or robotic) parts. The term cyborg is often applied to an organism that has enhanced abilities due to technology, though this perhaps oversimplifies the necessity of feedback for regulating the subsystem.
Cyborgs are a synthesis of organic and synthetic parts, and frequently pose the question of difference between human and machine. They are also often equipped with physical or mental abilities far exceeding a human counterpart (military forms may have inbuilt weapons, among other things).