Syllabic consonant
A syllabic consonant, or vocalic consonant, is a consonant that forms the nucleus of a syllable on its own, like the m, n and l in some pronunciations of the English words rhythm, sudden and awful, respectively. To represent it, the understroke diacritic in the International Phonetic Alphabet is used, ⟨U+0329 ◌̩ COMBINING VERTICAL LINE BELOW⟩.