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The Collaborative International Dictionary
colemouse

Coletit \Cole"tit`\ or Coaltit \Coal"tit\, n. (Zo["o]l.) A small European titmouse ( Parus ater), so named from its black color; -- called also coalmouse and colemouse. [1913 Webster] ||

Wiktionary
colemouse

n. (alternative form of coalmouse English)