| 单词 | periastron |
| 释义 | periastron[ per-ee-as-truhn, -tron ] / ˌpɛr iˈæs trən, -trɒn / noun, plural per·i·as·tra [per-ee-as-truh]. /ˌpɛr iˈæs trə/. Astronomy.the point at which the stars of a binary system are closest (opposed to apastron). Origin of periastron1850–55; <peri- + Greek ástron star; modeled on perihelion OTHER WORDS FROM periastronper·i·as·tral, adjectiveWords nearby periastronperiarteritis, periarteritis nodosa, periarthritis, periarticular, periarticular abscess, periastron, periaxillary, periblem, Peribonca, peribronchial, peribronchiolar Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 Example sentences from the Web for periastron
British Dictionary definitions for periastronperiastron / (ˌpɛrɪˈæstrɒn) / nounastronomy the point in the orbit of a body around a star when it is nearest to the star, esp applied to double-star systems 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 Scientific definitions for periastronperiastron [ pĕr′ē-ăs′trən, -trŏn ] Plural periastraThe point at which an object, such as a planet or comet, is closest to the center of mass of the star it is orbiting. Compare apastron. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved. |
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