From Longman Dictionary of Contemporary Englishcocker spanielcock‧er span‧iel /ˌkɒkə ˈspænjəl $ ˌkɑːkər-/ noun [countable] HBAa dog with long ears and long silky fur
Examples from the Corpus
cocker spaniel• He would spirit me away, to a home on the Mainland complete with plush carpet and a cocker spaniel pup.• However, my cocker spaniel rates it top of the list for smell.• The cocker spaniel puppy stopped abruptly, then eyed the spinning leaf overhead.Origin cocker spaniel (1800-1900) cocking “bird-shooting” 