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.
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