expeller
noun
ex·pel·ler
| \ ikˈspelə(r), ek-\
plural expellers
Definition of expeller
: one that expels someone or something
They point to the abject failure to reform immigration policy and say that … America has become what it never has been—an expeller of huddled masses.— Gregg Krupa, Detroit News, 4 Dec. 2008
especially
: a screw press for expressing vegetable oil from soybeans or other seeds
In industrial practice, after the oil is removed using mechanical means by an expeller, you have a mash that's left over. — Jimmy Lovaas, Seattle Times, 10 June 2013
—often used in combination
expeller-pressed canola oil