Word.ws English Dictionary

rock butter

rock butter noun: native alum mixed with clay and iron oxide, usually in soft masses of a yellowish-white colour, occurring in cavities and fissures in argillaceous slate.

Noun

rock butter (uncountable)

  1. Native alum mixed with clay and iron oxide, usually in soft masses of a yellowish-white colour, occurring in cavities and fissures in argillaceous slate.

Questions about rock butter

What does rock butter mean?
Rock butter means native alum mixed with clay and iron oxide, usually in soft masses of a yellowish-white colour, occurring in cavities and fissures in argillaceous slate.
What part of speech is rock butter?
Rock butter is a noun.

Words near rock butter in the dictionary

  1. rock bottom
  2. rock bun
  3. rock buns
  4. rock bunting
  5. rock buntings
  6. rock butter
  7. rock cake
  8. rock cakes
  9. rock cam
  10. rock cams
  11. rock candy

Source and license

Adapted from Wiktionary: rock butter (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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