Claystone

noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    Sedimentary rock composed of fine clay particles. countable, uncountable
  2. 2
    fine-grained rock consisting of compacted clay particles wordnet
  3. 3
    One of the concretionary nodules in alluvial deposits. countable, uncountable

Etymology

From clay + stone.

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.