n.
Pronunciation: ' ī -s ə - ˌ gläs, - ˌ glo ̇ s
Function: noun
Etymology: International Scientific Vocabulary is- + Greek gl ō ssa 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 \ ˌ ī -s ə - ' glä-s ə l, - ' glo ̇ - \ adjective
– iso · gloss · ic \ - ' glä-sik, - ' glo ̇ - \ adjective