triamcinolone /ˌtɹaɪˌæmˈsɪn.əˌloʊn/ noun1 •A glucocorticoid steroidal drug 9-fluoro-16-hydroxyprednisolone used chiefly in the form of its acetal or acetate derivatives especially in treating skin disorders, asthma, and allergic rhinitis. formstriamcinolones