Definition of "loader"
loader
/ˈloʊdɚ/
noun
plural loaders
plural loaders
(decorative arts) Lowered, beaten down, or cut away, as the background of an ornamental pattern in relief. Used specifically of stone-cutting; also of metal when the pattern or inscription is to show bright on dark, and the ground is therefore worked out with the graving-tool and left rough or hatched in lines.