definitions
  • synonyms

roche alum

[ rohch ]
/ roʊtʃ /

noun Chemistry.

an alumlike substance derived from alunite.

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Nearby words

rocambole, rocard, rochalimaea, rochambeau, rochdale, roche alum, roche limit, roche moutonnée, roche-sur-yon, la, rochelle, rochelle powder

Origin of roche alum

1400–50; roche cliff, rocky height (now obsolete), late Middle English (see rock1); apparently partial translation of Middle French alum en roque, alun de roche
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019