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planetology

[plan-i-tol-uh-jee] /ˌplæn ɪˈtɒl ə dʒi/
noun
1.
the branch of astronomy that deals with the physical features of the planets.
Origin of planetology
1905-1910
First recorded in 1905-10; planet + -o- + -logy
Related forms
planetological
[plan-i-tl-oj-i-kuh l] /ˌplæn ɪ tlˈɒdʒ ɪ kəl/ (Show IPA),
adjective
planetologist, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for planetologist

planetology

/ˌplænɪˈtɒlədʒɪ/
noun
1.
(astronomy) the study of the origin, composition, and distribution of matter in the planets
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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