le·vo·nor·ges·trel .lē-və-nȯr-'jes-trəl n the levorotatory form of norgestrel used in birth control pills and contraceptive implants see NORPLANT
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n.
a synthetic female sex hormone - a progestogen - used mainly in oral contraceptive, either in combination with an oestrogen or as a progestogen-only preparation. Trade names: Microval, Norgeston, Norplant.
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le·vo·nor·ges·trel (leґvo-nor-jesґtrel) [USP] the levorotatory form of norgestrel, administered as a subdermal contraceptive implant or in combination with an estrogen component in an oral contraceptive. It is also administered orally as a progestin-only contraceptive for emergency postcoital contraception.Medical dictionary. 2011.