Definition of cardinal vowel noun from the Oxford Advanced Learner's Dictionary


cardinal vowel

BrE BrE//ˌkɑːdɪnl ˈvaʊəl//
; NAmE NAmE//ˌkɑːrdɪnl ˈvaʊəl//
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one of a set of vowels which are used as reference points when describing the vowels in a particular language
See the Oxford Advanced American Dictionary entry: cardinal vowel