Two or more
segments are tautosyllabic (with each other) if they occur in the same
syllable
A syllable is a unit of organization for a sequence of speech sounds typically made up of a syllable nucleus (most often a vowel) with optional initial and final margins (typically, consonants). Syllables are often considered the phonological "bu ...
. For instance, the English word "cat", , is
monosyllabic In linguistics, a monosyllable is a word or utterance of only one syllable. It is most commonly studied in the fields of phonology and morphology and it has no semantic content. The word has originated from the Greek language.
"Yes", "no", "jump", ...
and so its three phonemes , and are tautosyllabic. They can also be described as sharing a 'tautosyllabic distribution'.
Phonemes that are not tautosyllabic are heterosyllabic. For example, in the English word "mustard" , and are heterosyllabic since they are members of different syllables.
See also
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Ambisyllabicity
A syllable is a unit of organization for a sequence of speech sounds typically made up of a syllable nucleus (most often a vowel) with optional initial and final margins (typically, consonants). Syllables are often considered the phonological "bu ...
, sounds that are arguably shared between two syllables (such as 'rr' in British English "hurry")
References
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Phonotactics
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