Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Tokai Teio was a Japanese thoroughbred racehorse, sired by Symboli Rudolf, a son of Partholon, out of Tokai Natural, a daughter of Nice Dancer. Tokai Teio was inducted into the Japan Racing Association Hall of Fame in 1995. A stallion is a male horse that has not been gelded (castrated). Stallions will follow the conformation and phenotype of their breed, but within that standard, the presence of hormones such as testosterone may give stallions a thicker, "cresty" neck, as well as a somewhat more muscular physique as compared to female horses, known as mares, and castrated males, called geldings.