What is "tromos"

Tromos (10 March 1976 – October 1982) was a British Thoroughbred racehorse and sire. In the autumn of 1978 he won the Clarence House Stakes by thirteen lengths and the Dewhurst Stakes by three. As a result of these performances he was rated the best two-year-old racehorse in Europe by both the independent Timeform organisation and the official International Classification. After being beaten in the Craven Stakes on his first run in 1979 he suffered from ill health and did not race again in Europe. He returned to racing as a four-year-old in the United States but was well beaten in both his races. Tromos was then retired to stud, but died only two years later.