Word.ws English Dictionary

calmstone

calmstone noun: a sandstone, shale, or mudstone that forms in layers that are easily split into flagstones.

Noun

calmstone (countable and uncountable, plural calmstones)

  1. (colloquial) A sandstone, shale, or mudstone that forms in layers that are easily split into flagstones.
    • The mineralogical characters of both sandstone and calmstone are identically the same, as well as the fossil organic remains, which occur so abundantly in the latter.1841, Transactions of the Highland and Agricultural Society of Scotland, page 380
    • The grey flags and thin grey and olive shales and ' calmstones ' are almost confined to Forfarshire, and in the north-east part of the basin are known as Arbroath flags.1885, Sir Charles Lyell, The Student's Elements of Geology, page 403

Forms of calmstone

pluralcalmstones

Questions about calmstone

What does calmstone mean?
Calmstone means a sandstone, shale, or mudstone that forms in layers that are easily split into flagstones.
What part of speech is calmstone?
Calmstone is a noun.
What is the plural of calmstone?
The plural of calmstone is calmstones.

Words near calmstone in the dictionary

  1. calmoniid
  2. calmoniids
  3. calms
  4. calms before storms
  5. calms down
  6. calmstone
  7. calmstones
  8. calmth
  9. Calmuck
  10. Calmucks
  11. calmy

Source and license

Adapted from Wiktionary: calmstone (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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