Dictionary of Science

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This dictionary is provided for quick and easy reference. CARM is adding to the dictionary regularly and plans to have thousands of entries. If you have a suggestion on word(s), please contact us at http://www.carm.org/submit-feedback

All graphics used in this dictionary are either created by CARM, are free clip art, are from istockphoto.com with purchased distribution rights, or are from commons.wikimedia.org that have been released into the public domain.

Note: Many of the definitions here reflect secular ideas about evolution, geological time scales, etc. The dictionary is aimed at reporting what those theories state and CARM does not endorse every definition. For example, CARM rejects macro-evolution but has defined it according to present evolutionary theory.



  • Lewin, Roger, The Thread of Life, Smithsonian Books, Washington, D.C., 1982.


    • http://dictionary.reference.com
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    • http://www.iep.utm.edu/
    • http://www.thefreedictionary.com/
    • http://commons.wikimedia.org