In such machines the paper travels from a supply roll to a coating roller, usually made hollow for holding steam or hot water, which revolves in a bath of coating material to keep it in a fluidous condition, so that when the paper comes in contact[...]
Source: wiktionary
While all that is creaturely is by nature continually changeable, all that is physical (even mountains) is really molecular energy and therefore fluidous, the Eternal is solid in the sense of being real in the glorious sense of being dependably immutable.
Source: wiktionary
What better symbol of progress than an object making its way through a “resistor”—a near-living organism that succeeded in progressing by “pilotage, astronomical navigation, 'dead reckoning,' and deep-sea sounding” (724) within a fluidous medium?
Source: wiktionary