1 ผลลัพธ์ สำหรับ *phthongometer*
หรือค้นหา: phthongometer, -phthongometer-

Collaborative International Dictionary (GCIDE)
Phthongometer

n. [ Gr. &unr_; voice + -meter. ] An instrument for measuring vocal sounds. Whewell. [ 1913 Webster ]


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