Advertisement

Advertisement

roche alum

[ rohch ]

noun

, Chemistry.
  1. an alumlike substance derived from alunite.


Discover More

Word History and Origins

Origin of roche alum1

1400–50; roche cliff, rocky height (now obsolete), late Middle English ( rock 1 ); apparently partial translation of Middle French alum en roque, alun de roche
Discover More

Example Sentences

Or, wash the brass-work with a strong solution of roche alum, and polish it with tripoli.

If one ounce of powdered roche-alum be put into a cask of four gallons of wine, it will make it fine and brisk in ten days.

A strong lye of roche alum and water also improves the appearance of brass.

Advertisement

Advertisement

Advertisement

Advertisement


RochdaleRoche limit