[syn: optic cup, eyecup]
The Collaborative International Dictionary of English v.0.48:
eyecup \eye"cup`\, 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]
WordNet (r) 3.0 (2006):
eyecup
    n 1: a small vessel with a rim curved to fit the orbit of the
         eye; use to apply medicated or cleansing solution to the
         eyeball; "an eyecup is called an eyebath in Britain" [syn:
         eyecup, eyebath, eye cup]
    2: (embryology) a two-walled cuplike depression that develops
       into the pigmented and sensory layers of the retina [syn:
       optic cup, eyecup]