| The American Heritage® Dictionary of the English Language: Fourth Edition. 2000. |
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| astronomy |
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| SYLLABICATION: | as·tron·o·my |
| PRONUNCIATION: |   -str n -m |
| NOUN: | Inflected forms: pl. as·tron·o·mies
1. The scientific study of matter in outer space, especially the positions, dimensions, distribution, motion, composition, energy, and evolution of celestial bodies and phenomena. 2. A system of knowledge or beliefs about celestial phenomena: the various astronomies of ancient civilizations. | | ETYMOLOGY: | Middle English astronomie, from Old French, from Latin astronomia, from Greek astronomi : astro-, astro- + -nomi, -nomy.
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| The American Heritage® Dictionary of the English Language, Fourth Edition. Copyright © 2000 by Houghton Mifflin Company. Published by the Houghton Mifflin Company. All rights reserved. |
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