Definify.com
Webster 1913 Edition
Bulldog
Bull′dogˊ
,Noun.
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.
Bull′dogˊ
,Adj.
Characteristic of, or like, a bulldog; stubborn;
as,
. bulldog
courage; bulldog
tenacityBulldog bat
(Zo’94l.)
, a bat of the genus
Nyctinomus
; – so called from the shape of its face.