An example of an isogloss is the line on a map that shows the division of two populations which have different pronunciations for a a specific vowel.
- a line of demarcation between regions differing in a particular feature of language, as on a point of pronunciation, vocabulary, etc.
- such a line indicated on a map
Origin of isoglossfrom iso- + Classical Greek gl?ssa, tongue, speech: see gloss
Origin of isoglossiso- Greek glōssa language, tongue
From iso- + gloss, ultimately from Ancient Greek ἴσος (isos, “equal”) and γλῶσσα (glōssa, “tongue”).