Also found in: Medical.
Any of various extinct, chiefly Carboniferous trees of the genus Calamites, anatomically similar to the modern-day herbaceous horsetails (Equisetum).
[New Latin Calamītēs, genus name, from Late Greek kalamītēs, reedlike, from Greek kalamos, reed.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(Plants) any extinct treelike plant of the genus Calamites, of Carboniferous times, related to the horsetails
[C19: from New Latin Calamītes type genus, from Greek kalamitēs reedlike, from kalamos reed]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
any fossil plant of the genus Calamites and related genera of the Carboniferous Period, resembling oversized horsetails.
[1745–55; < New Latin Calamites < Greek kalamitēs reedlike]
ca•lam•i•toid (kəˈlæm ɪˌtɔɪd) adj.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.