waterstuff

noun2

1. •
   Things containing, associated with, or involving water.

   • Any application to the atmosphere of thermodynamics which assumes that waterstuff below 0° C. is ice must necessarily lead the investigator into error. — 1911
2. •
   (nonstandard, rare) Hydrogen.

   • This is approximately the heat of exploding what the Germans call bang-gas (mixture of sourstuff and waterstuff), the result being liquid. — 1887