CYTOSINE Antonyms There are 4 antonyms of the word cytosine. (opposite meanings)Did you mean?Definition of CYTOSINEBest Opposite Words For CYTOSINETop 20Top 10 Top 20 (Default)Top 50 Top 100 All All (Default)WordsPhrases All All (Default)Verb Noun Adjective Adverb RankWordSave?Synonyms..UsageType1adeninenounn2guaninenounn3thyminenounn4uracilnounn Alternatives for ADENINE Words (1)aOpposite words for adenine