Roman alum

noun

A cubical potassium alum formerly obtained in large quantities from Italian alunite, and highly valued by dyers due to it being iron-free.

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Meanings

nounRoman alum (uncountable)
  1. uncountableA cubical potassium alum formerly obtained in large quantities from Italian alunite, and highly valued by dyers due to it being iron-free.
Cite this entry
APA

Roman alum. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/Roman%20alum

MLA

“Roman alum.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/Roman%20alum. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “Roman alum,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/Roman%20alum.

Source: Roman alum on Wiktionary, CC BY-SA 4.0.