The Collaborative International Dictionary of English v.0.48:

norethandrolone \norethandrolone\, norethindrone
\norethindrone\n.
   1. a progestin compound used in oral contraceptives and to
      treat endometriosis.
      [WordNet 1.5]

WordNet (r) 3.0 (2006):

norethindrone
    n 1: a synthetic progestational hormone (trade name Norlutin)
         used in oral contraceptives and to treat endometriosis
         [syn: norethindrone, norethindrone acetate,
         norethandrolone, Norlutin]