母音は英語で
vowel

英語の定義

母音
1. n. (obsolete phonology) one of the five morae of the あ行, that consists solely of a vowel
(holo, ja, 子音, tr=shion)
(cot, ja, 父音, tr=fuon)
2. n. (phonetics phonology) a vowel
(cot, ja, 子音, tr=shiin)

vowel
1. 名詞. (linguistics) 母音。

vowel
1. n. (phonetics) A sound produced by the vocal cords with relatively little restriction of the oral cavity, forming the prominent sound of a syllable.
2. n. (orthography) A letter representing the sound of vowel; in English, the vowels are a, e, i, o and u, and sometimes y.
3. v. (linguistics) To add vowel points to a consonantal script (e.g. niqqud in Hebrew or harakat in Arabic)