a person or thing that expels.
a press used to extract oil from corn, soybeans, etc.

Origin of expeller

First recorded in 1570–80; expel + -er1
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British Dictionary definitions for expellers


pl n

the residue remaining after an oilseed has been crushed to expel the oil, used for animal foddergroundnut expellers Compare extractions
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012