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metabisulfite test

[mĕt′ə-bī-sŭl′fīt′]
n.
  1. A test for sickle-cell hemoglobin in which red blood cells are deoxygenated by the addition of sodium metabisulfite and the cells containing the defective hemoglobin assume a sickle shape.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.