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Noun
Definition: A synthetic progestogen C₂₃H₃₁NO₃ (trademark Ortho Tri-Cyclen) that is used in combination with an estrogen (as ethinylestradiol) in birth control pills.
VariousWords beta
Definition: A synthetic progestogen C₂₃H₃₁NO₃ (trademark Ortho Tri-Cyclen) that is used in combination with an estrogen (as ethinylestradiol) in birth control pills.