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cardinal vowel

noun, Phonetics
1.
any one of eight primary, purportedly invariant, sustained vowel sounds that constitute a reference set for describing the vowel inventory of a language.
2.
any one of the eight or more supplementary or secondary cardinal vowels.
Origin
1920-1925
1920-25
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for cardinal vowels

cardinal vowels

plural noun
1.
a set of theoretical vowel sounds, based on the shape of the mouth needed to articulate them, that can be used to classify the vowel sounds of any speaker in any language
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Difficulty index for cardinal vowel

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Word Value for cardinal

11
14
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