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mes·tra·nol 'mes-trə-.nȯl, -.nōl n a synthetic estrogen C21H26O2 used in birth control pills see ENOVID, ORTHO-novum
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n.
a synthetic female sex hormone (see oestrogen) used in combination with a progestogen to treat menopausal symptoms (see hormone replacement therapy) and as a constituent of oral contraceptive pills. Trade names: Menophase, Norinyl-1.
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mes·tra·nol (mesґtrə-nol) [USP] the 3-methyl ether of ethinyl estradiol, used in combination with a progestational agent as an oral contraceptive.Medical dictionary. 2011.