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conodont

 - 3 dictionary results

co⋅no⋅dont

[koh-nuh-dont, kon-uh-]
–noun
a Paleozoic microfossil occurring in various jagged or toothlike shapes and constituting the hard remains of an extinct marine animal of the order Conodonta (or Conodontophorida), found abundantly worldwide in sedimentary rock.

Origin:
1855–60; < G Conodonten (pl.) < Gk kôn(os) cone + -odont -odont
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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co·no·dont   (kō'nə-dŏnt', kŏn'ə-)   
n.  
  1. A member of an extinct group of small primitive fishlike chordates, preserved primarily in the form of their conelike teeth.

  2. A fossil tooth of this chordate. Conodonts are the most widespread Paleozoic microfossils and are important for biostratigraphic indexing.


[Greek kōnos, cone; see kō- in Indo-European roots + -odont.]
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Science Dictionary
conodont   (kō'nə-dŏnt', kŏn'ə-)  Pronunciation Key 
Any of various minute, toothlike or bladelike fossils made of the mineral apatite and dating from the Cambrian to the late Triassic Period. They are virtually the only preserved parts of extinct eellike animals that are now thought to have been primitive vertebrates similar to the modern hagfishes. Conodonts grew in paired assemblages in the head region of the animal and probably formed part of the feeding apparatus. They are the most widespread microfossils of the Paleozoic Era and are very important for determining the age of rock strata.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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