Definify.com
Webster 1913 Edition
Sprue
Sprue
(sprṳ)
, Noun.
[Etymol. uncertain.]
1.
(Founding)
(a)
Strictly, the hole through which melted metal is poured into the gate, and thence into the mold.
(b)
The waste piece of metal cast in this hole; hence, dross.
Webster 1828 Edition
Sprue
SPRUE
,Noun.
1.
A matter formed in the mouth in certain diseases.2.
In Scotland, that which is thrown off in casting metals; scoria.