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Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
sildenafil is a noun meaning "virility drug (trade name Viagra) used to treat erectile dysfunction in men". It carries one recorded sense.
virility drug (trade name Viagra) used to treat erectile dysfunction in men
trade name
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for sildenafil come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.