eyeball
- The round part of the eye of a vertebrate, within which the visual processes occur. It is the globe-shaped portion of the eye that houses the retina and other structures necessary for vision. nounThe doctor examined the patient's eyeball for any signs of infection.She could feel the pressure building up behind her eyeball, causing discomfort.
- To look or stare at something or someone intently or closely. verbHe eyeballed the suspect from across the room, trying to gauge his intentions.She eyeballed the measurements to make sure they were accurate.