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Medical Definition of Alpha-cortolone
1. 3a,17a,20a,21-Tetrahydroxy-5b-pregnane-11-one;the 5b enantiomer of alpha-allocortolone; a reduction product of cortisone, present in the urine, differing from cortisone in that two of the keto groups (at positions 3 and 20) are reduced to hydroxyls. (05 Mar 2000)