等とう語ご線せんとうごせんMeanings1nounisoglosslinguisticsLinguistics term for a geographic boundary line separating areas with different linguistic features.方ほう言げんの分ぶん布ぷを調しらべるとき、等とう語ご線せんを引ひくことがある。When investigating dialect distribution, we sometimes draw isoglosses.
