calmstone

名词 n.
中文释义

英文释义

名词 n.
  1. A sandstone, shale, or mudstone that forms in layers that are easily split into flagstones. colloquial,countable,uncountable
    — 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.

词形变化

calmstones plural
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