noun.
A can for oil, especially a can with a spout constructed to release oil drop by drop, as for lubricating machinery.
The Century Dictionary and Cyclopedia
noun.
Any can for holding oil; specifically, a small can of various shapes, provided with a long, narrow, tapering spout, used for lubricating machinery, etc.; an oiler.
the GNU version of the Collaborative International Dictionary of English
noun.
A small can with a long spout used to apply oil to machinery, for purposes of lubrication.
noun.
A container with a long spout, for containing oil and delivering it in drops or small quantities for lubricating machinery
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
noun.
a can with a long nozzle to apply oil to machinery
Word Usage
"Water I already had as a Z-Vex Seek Wah fed into a mid-speed Z-Vex Ooh Wah, or at least that's what I used for the elemental piece we performed last May: but last May I didn't have the Morley EVO-1 "oilcan" echo pedal, which is a liquid-based delay pedal with a ridiculously liquid sound and saturation, so add that in as an flavoring agent."