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Segment (linguistics)
In linguistics, a segment is "any discrete unit that can be identified, either physically or auditorily, in the stream of speech". The term is most used in phonetics and phonology to refer to phones and phonemes, but can be applied for any minimum unit of a linear sequence meaningful to the given field of analysis, such as a mora or a syllable, a morpheme in morphology, or a chereme in sign language analysis.
Segments are called "discrete" because they are separate and individual, such as consonants and vowels, and occur in a distinct temporal order. Other contrastive elements of speech, such as prosody (tone, stress), and sometimes secondary articulations such as nasalization, may coexist with multiple segments and cannot be discretely ordered with them. These elements are termed ''suprasegmental''.
== Kinds of segment ==
In phonetics, the smallest perceptible segment is a phone. In phonology, there is a subfield of segmental phonology that deals with the analysis of speech into phonemes (or ''segmental phonemes''), which correspond fairly well to phonetic segments of the analysed speech.
The segments of sign language, called cheremes, are visual movements of hands, face, and body. They occur in a distinct spatial and temporal order. The SignWriting script represents the spatial order of the segments with a spatial cluster of graphemes. Other notations for sign language use a temporal order that implies a spatial order.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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