Any of various extinct, chiefly Carboniferous trees of the genus Calamites, anatomically similar to the modern-day herbaceous horsetails (Equisetum).
An extinct paleozoic plant (order Calamitales) related to modern horsetails but growing to the size of a tree.
Origin of calamite
- New Latin Calamītēs genus name from Late Greek kalamītēs reedlike from Greek kalamos reed
From American Heritage Dictionary of the English Language, 5th Edition