isogloss

noun
iso·gloss | \ˈī-sə-ˌgläs, -ˌglȯs\

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

Other Words from isogloss

isoglossal \ˌī-sə-ˈglä-səl, -ˈglȯ- \ adjective
isoglossic \ˌī-sə-ˈglä-sik, -ˈglȯ- \ adjective

First Known Use of isogloss

1925, in the meaning defined at sense 1

History and Etymology for isogloss

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

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Time Traveler for isogloss

The first known use of isogloss was in 1925

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Britannica.com: Encyclopedia article about isogloss

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