dropstone

English dictionary entry

Meanings

noun
  1. An isolated fragment of rock found within a sedimentary rock (that had fallen, rather than being carried along).
  2. An isolated rock that is geologically distinct from the surroundings, indicating that it was carried from a distant area and then dropped in place (by a melting glacier); an erratic.

Word forms

dropstone dropstones

Etymology

From drop + stone.

Synonyms

Related words

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