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Meaning of radioimmunoassay

ra•di•o•im•mu•no•as•say

Pronunciation: (rā"dē-ō-im"yu-nō-as'ā, -a-sā', -i-my"-), [key]
— n.
  1. a test procedure that integrates immunologic and radiolabeling techniques to measure minute quantities of a substance, as a protein, hormone, or drug, in a given sample of body fluid or tissue.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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