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单词 phthongometer
释义 phthonˈgometer rare.
[f. as prec. + -meter.]
A measurer of the intensity of vowel sounds.
1837Whewell Hist. Induct. Sc. (1857) II. 266 We may..consider this instrument as a phthongometer, or measure of vowel quality.1848in Smart Supp., and in later Dicts.
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