Definition from Wiktionary, the free dictionary
The terms vitreous (positive) and resinous (negative) electricity were coined in 1733 by Charles François de Cisternay du Fay, who studied the different behaviour of glass and resin when rubbed with silk and fur, respectively.
- Of, or resembling glass; glassy
- Of, or relating to the vitreous humor of the eye
- (of ceramics) having a shiny nonporous surface
- (chemistry) Of a semi-crystalline substance where the atoms exhibit short-range order, but without the long-range order of a crystal
- (physics, dated) positive (of electric charge)
- (electric charge) resinous
Derived terms 
- (by elision) The vitreous humor.