a closed cup or can supplying lubricant to a bearing or bearings.
Origin of oilcup
Also called grease cup.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
a cup-shaped oil reservoir in a machine providing continuous lubrication for a bearing
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