Alcide (1955–1973) was a British Thoroughbred racehorse. It is widely believed that Alcide would have won Epsom's 1958 Derby had not probable foul play prevented him from running. A form line through , who was third in the Derby, gives credibility to the theory that a fully fit Alcide would have won the race. During this period there was an alarming amount of apparent villainy in racing and it seems likely that the broken rib that Alcide sustained in his stable after he had won the Lingfield Derby Trial was deliberate.