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microsphere
[ mahy-kroh-sfeer ]
noun
- a tiny sphere or bead, often hollow or filled with some other substance: used for a variety of purposes, such as in building materials, cosmetics, and scientific research.
- Medicine/Medical.
- a tiny hollow sphere injected into a blood vessel in order to block the flow of blood to a tumor and, in some cases, deliver chemicals or radiation to kill the tumor’s cells.
- a tiny hollow sphere that can be injected into the bloodstream or, sometimes, implanted into a tissue of the body: used therapeutically to deliver medicine or nutrients, or diagnostically to study the flow of blood to a certain area.
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Word History and Origins
Origin of microsphere1
First recorded in 1890–95; micro- ( def ) + sphere ( def )
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