/ ˈkɒkə(r); NAmE ˈkɑːk-/ (also ˌcocker ˈspaniel ) noun
a small spaniel (= type of dog) with soft hair
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WORD ORIGIN
early 19th cent.: from cock + -er (the dog was bred to flush out game birds such as woodcock).
COCKER
Meaning of COCKER in English
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005