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lecithin-sphingomyelin ratio in Medicine

lecithin-sphingomyelin ratio

n.
  1. The ratio of lecithin to sphingomyelin present in amniotic fluid, used to determine fetal pulmonary maturity.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.