rare-earth element

[ rair-urth ]
/ ˈrɛərˈɜrθ /

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 element

First recorded in 1955–60

Words nearby rare-earth element

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Medical definitions for rare-earth element

rare-earth element


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 element

rare-earth element
[ râr′ûrth ]

See lanthanide.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.