Main Entry: iso·gloss

Pronunciation: \ˈī-sə-ˌgläs, -ˌglȯs\

Function: noun

Etymology: International Scientific Vocabulary is- + Greek glōssa language — more at gloss

Date: 1925

1 : a boundary line between places or regions that differ in a particular linguistic feature
2 : a line on a map representing an isogloss

— iso·gloss·al \ˌī-sə-ˈglä-səl, -ˈglȯ-\ adjective

— iso·gloss·ic \-ˈglä-sik, -ˈglȯ-\ adjective