WordReference Random House Unabridged Dictionary of American English © 2020
cal•a•mite  (kalə mīt′),USA pronunciation n. 
  1. Paleontologyany fossil plant of the genus Calamites and related genera of the Carboniferous Period, resembling oversized horsetails and constituting much of the coal used as fuel.
cal•a•mi•te•an  (kalə mīt′),USA pronunciation adj.  ca•lam•i•toid  (kalə mīt′),USA pronunciation adj. 
  • Greek kalamí̄tēs reedlike. See calamus, -ite1
  • Neo-Latin Calamites the genus name, Latin calamītēs
  • 1745–55;

'calamite' also found in these entries (note: many are not synonyms or translations):

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