Dictionary.net

• 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"

2006 - WordNet 3.0
By Princeton University

• 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"

2011 - English Dictionary Database
By DataStellar Co., Ltd