metamaterial
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met·a·ma·te·rial
(mĕt′ə-mə-tîr′ē-əl)n.
A usually artificial material that exhibits special properties not normally found in nature, such as a negative index of refraction, in its interaction with electromagnetic radiation, sound, or other wave phenomena. Such properties are a consequence of the metamaterial's structure at the microscopic or macroscopic level, rather than of the underlying properties of its components.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
metamaterial
(ˌmɛtəməˈtɪərɪəl)n
(General Physics) any artificial material created from microscopic arrangements of existing elements in a structure which gives the material unconventional properties, esp when used for cloaking light or sound waves
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