ratsbane ratproof • ratskeller · · · Info · Definitions · Synonyms · Characters · · ratsbane · · Text Latin · · Script 8 · · Length Definitions · · · (noun) a white powdered poisonous trioxide of arsenic; used in manufacturing glass and as a pesticide (rat poison) and weed killer. Synonyms: arsenic, arsenic trioxide, arsenous anhydride, arsenous oxide, white arsenic. · · Noun Definition 1 Synonyms · · · arsenic · · Synonym 1 arsenic trioxide · · Synonym 2 arsenous anhydride · · Synonym 3 arsenous oxide · · Synonym 4 white arsenic · · Synonym 5 Characters · · a latin small letter a U+0061 b latin small letter b U+0062 e latin small letter e U+0065 n latin small letter n U+006E r latin small letter r U+0072 s latin small letter s U+0073 t latin small letter t U+0074