音おん節せつ主しゅ音おんおんせつしゅおんMeanings1nounsyllabicTechnical term in phonetics referring to a sound that functions as the nucleus of a syllable.日本にほん語ごでは、母ぼ音いんが音おん節せつ主しゅ音おんになることが多おおい。In Japanese, vowels often become the syllabic nucleus.