ranitidine raninian • ranivorous · · · Info · Definitions · Synonyms · Characters · · ranitidine · · Text Latin · · Script 10 · · Length 4 · · Syllables Definitions · · · (noun) a histamine blocker and antacid (trade name Zantac) used to treat peptic ulcers and gastritis and esophageal reflux. Synonyms: Zantac. · · Noun Definition 1 Synonyms · · · zantac · · Synonym 1 Characters · · a latin small letter a U+0061 d latin small letter d U+0064 e latin small letter e U+0065 i latin small letter i U+0069 n latin small letter n U+006E r latin small letter r U+0072 t latin small letter t U+0074