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From Biology-Online Dictionary | Biology-Online Dictionary
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(Science: drug) a synthetic progestational hormone used often as the progestogenic component of combined oral contraceptive agents.

Pharmacological action: contraceptives, oral, synthetic, progestational hormones, synthetic.

chemical name: 18,19-Dinorpregn-4-en-20-yn-17-ol, 13-ethyl-11-methylene-, (17alpha)-