IPA phonetic symbol 〚m̩〛

The IPA phonetic symbol [m&#809;] (lowercase "m" with a small vertical line below) represents syllabic /m/, a syllable with no vowel (syllabic consonant), as in "rhythm" [ˈrɪðm&#809;] or "system" [ˈsɪstm&#809;]. In a broad notation [m&#809;] is /əm/ and most dictionaries prefer that notation: ˈsɪstəm/.

Common words

 * bottom, freedom, item, maximum, mechanism, minimum, problem, symptom, system

[əm] vs [əm]
Below we can see the pronunciation of /əm/ depending on the previous consonant according to the Cambridge Dictionaries Online (Cambridge Advanced Learner's Dictionary, aka British English section, CALD). Most other dictionaries always use /əm/.

Unicode and HTML
Unicode: U+0329 Combining vertical line below

HTML:
 * Hexadecinal: m&amp;#x329;
 * Decimal: m&amp;#809;