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Definition of BARNACLE GOOSE
: a European goose (Branta leucopsis) that has a whitish face and black breast and breeds in the arctic
First Known Use of BARNACLE GOOSE
Species (Branta leucopsis) of waterbird that resembles a small Canada goose, with dark back, white face, and black neck and bib. It winters in the northern British Isles and on the coasts of Denmark, Germany, and the Netherlands. In the Middle Ages, it was thought to hatch from barnacles, and thus was considered fish and could be eaten on Fridays.