(n) a small vessel with a rim curved to fit the orbit of the eye; use to apply medicated or cleansing solution to the eyeball, Syn. eyebath, eye cup, Example:an eyecup is called an eyebath in Britain
The Collaborative International Dictionary of English (GCIDE) v.0.53 Collaborative International Dictionary (GCIDE)
n. A small oval porcelain or glass cup, having a rim curved to fit the orbit of the eye. it is used in the application of liquid remedies to eyes; -- called also eyeglass. [ 1913 Webster ]