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
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