pregnanetriol

[prĕg′nān-trīôl]
n.
  1. A urinary metabolite of 17-alpha-hydroxyprogesterone and a precursor in the biosynthesis of cortisol; its excretion increases in certain diseases of the adrenal cortex and following administration of corticotropin.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.