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From iso- + gloss, ultimately from Ancient Greek ἴσος (ísos, “equal”) (possibly from Proto-Indo-European *wi- (“to separate”)) + γλῶσσα (glôssa, “tongue; language”) (ultimately from Proto-Indo-European *glōgʰs).
- (Received Pronunciation) IPA(key): /ˈaɪsə(ʊ̆)ɡlɒs/
- (General American) IPA(key): /ˈaɪsəɡlɑs/
- Hyphenation: iso‧gloss
isogloss (plural isoglosses)
- (sociolinguistics, geography) A line on a map indicating the geographical boundaries of a linguistic feature.
- Synonym: heterogloss
- 1970, W[illiam] F[oxwell] Albright; T[homas] O[den] Lambdin, “The Evidence of Language”, in I[orwerth] E[iddon] S[tephen] Edwards, C[yril] J[ohn] Gadd, and N[icholas] G[eoffrey] L[emprière] Hammond, editors, The Cambridge Ancient History, volume I, part 1 (Prolegomena and Prehistory), 3rd edition, Cambridge: Cambridge University Press, published 2000, →ISBN, section IV (Sumerian, Hurrian, Urarṭian, Elamite), page 154:
- There was also a tendency to treat transitive verbs passively, as in Hurrian and Urarṭian; it must, however, be emphasized that this phenomenon may also be considered as an isogloss rather than as an indication of genetic relationship.
- 2005, Brian D. Joseph, Carol G. Preston, and Dennis R. Preston, editors, Language Diversity in Michigan and Ohio: Towards Two State Linguistic Profiles, Ann Arbor, Mich.: Caravan Books, →ISBN, page 29:
- The convergence of multiple isoglosses on a map, a "bundle", indicates a boundary between one regional dialect and another.
line indicating geographical boundaries of a linguistic feature