Merriam-Webster Collegiate Dictionary - thrush

 I. noun  Etymology: Middle English thrusche, from Old English thrysce; akin to Old English throstle ~, Old High German droscala, Latin turdus  Date: before 12th century any of numerous small or medium-sized birds of an oscine family (Turdidae, the ~ family) or in some classifications a subfamily (Turdinae of the family Muscicapidae) which are mostly of a plain color often with spotted underparts and many of which are excellent singers  II. noun  Etymology: probably of Scandinavian origin; akin to Danish troske ~, Swedish torsk  Date: 1665  1. a disease that is caused by a fungus (Candida albicans), occurs especially in infants and children, and is marked by white patches in the oral cavity; broadly candidiasis vaginal ~  2. a suppurative disorder of the feet in various animals (as a horse)