Dictionary

isogloss

noun iso·gloss \ˈī-sə-ˌgläs, -ˌgls\

Definition of ISOGLOSS

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, -ˈgl-\ adjective
iso·gloss·ic \-ˈglä-sik, -ˈgl-\ adjective

Origin of ISOGLOSS

International Scientific Vocabulary is- + Greek glōssa language — more at gloss
First Known Use: 1925

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