ranitidine ra·nit·i·dine (rə-nĭt'ĭ-dēn') n. An antagonist for one of two types of histamine receptors occurring on the surfaces of cells, especially gastric cells, that acts by inhibiting gastric acid secretion and is used in the treatment of duodenal ulcers.
an extraordinary or unusual thing, person, or event; an exceptional example or instance.
an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.
a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.
a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.
a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes.