isoglossa
1. A line on a map delineating the geographic boundary between regions that differ in a particular linguistic feature, such as pronunciation, vocabulary, or grammar.
The isogloss between the northern and southern dialects runs through the middle of the state.
A isoglossa entre os dialetos do norte e do sul passa pelo meio do estado.
2. In linguistics, a distinguishing feature of speech or language use that marks the boundary of a particular dialect or language area.
Linguists used isoglosses to map the distribution of the 'cot-caught' vowel distinction across North America.
Os linguistas usaram isoglossas para mapear a distribuição da distinção vocálica 'cot-caught' na América do Norte.
This is a highly specialized technical term used primarily in academic linguistics and dialectology. It is essential in the study of regional language variations and is commonly used in linguistic atlases and research on language geography. The term is equally recognized in both English-speaking and Portuguese-speaking academic communities, though it remains a specialized vocabulary item not widely used outside linguistic scholarship.
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