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/nɔː.ɹɛˈθɪ.stə.ɹəʊn/ · noun
(pharmacology) A synthetic steroid hormone, 19-nor-17α-ethynyltestosterone (C₂₀H₂₆O₂), which has actions similar to those of progesterone and is used chiefly for contraception..
Use norethisterone when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Norethisterone means (pharmacology) A synthetic steroid hormone, 19-nor-17α-ethynyltestosterone (C₂₀H₂₆O₂), which has actions similar to those of progesterone and is used chiefly for contraception..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Use norethisterone where its definition matches the intended context.
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