gray-headed
     adj : showing characteristics of age, especially having gray or
           white hair; "whose beard with age is hoar"-Coleridge;
           "nodded his hoary head" [syn: {gray}, {grey}, {gray-haired},
            {grey-haired}, {grey-headed}, {grizzly}, {hoar}, {hoary},
            {white-haired}]
Source: WordNet® 2.0