Bull"dog` (?), n.

1. Zool.

A variety of dog, of remarkable ferocity, courage, and tenacity of grip; -- so named, probably, from being formerly employed in baiting bulls.

2. Metal.

A refractory material used as a furnace lining, obtained by calcining the cinder or slag from the puddling furnace of a rolling mill.


© Webster 1913.

Bull"dog`, a.

Characteristic of, or like, a bulldog; stubborn; as, bulldog courage; bulldog tenacity.

Bulldog bat zo'94l., a bat of the genus Nyctinomus; -- so called from the shape of its face.


© Webster 1913.