noun Etymology: Middle English, leading sheep of a flock, leader, from belle bell + wether; from the practice of belling the leader of a flock Date: 13th century one that takes the lead or initiative ; leader
BELLWETHER
Meaning of BELLWETHER in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012