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semidiameter

 - 2 dictionary results

sem⋅i⋅di⋅am⋅e⋅ter

  [sem-ee-dahy-am-i-ter, sem-ahy-]
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–noun
half of a diameter; radius.
Origin:
1545–55; semi- + diameter
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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sem·i·di·am·e·ter   (sěm'ē-dī-ām'ĭ-tər, sěm'ī-)   
n.  The apparent radius of a celestial body when viewed as a disk from Earth.
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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