| 单词 | rare-earth element |
| 释义 | rare-earth element[ rair-urth ] / ˈrɛərˈɜrθ / SEE SYNONYMS FOR rare-earth element ON THESAURUS.COM noun Chemistry.any of a group of closely related metallic elements, comprising the lanthanides, scandium, and yttrium, that are chemically similar by virtue of having the same number of valence electrons. Also called rare-earth metal. Origin of rare-earth elementFirst recorded in 1955–60 Words nearby rare-earth elementrara avis, rare, rarebit, rare book, rare earth, rare-earth element, raree show, rarefaction, rarefied, rarefy, rare gas Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 Medical definitions for rare-earth elementrare-earth element n.lanthanide The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company. Scientific definitions for rare-earth elementrare-earth element [ râr′ûrth′ ] See lanthanide. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved. |
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