I. ˈ ̷ ̷ˌ ̷ ̷ noun
Etymology: eye (I) + ball
: the more or less globular capsule of the eye of vertebrates that is formed by the sclera and cornea together with its contained structures : the ball of the eye : the eye proper
II. transitive verb
slang : to look at intently or fixedly : stare at : eye
his triggermen huddled over a table in the corner, eyeballing me — Milton Mezzrow & Bernard Wolfe