1825-1895. English scientist and humanist. Following the publication of Charles Darwin's On the Origin of Species 1859, he became known as `Darwin's bulldog', and for many years was a prominent champion of evolution. In 1869, he coined the word `agnostic' to express his own religious attitude. He wrote Man's Place in Nature 1863, textbooks on physiology, and innumerable scientific papers. His later books, such as Lay Sermons 1870, Science and Culture 1881, and Evolution and Ethics were expositions of scientific humanism. His grandsons include Aldous, Andrew, and Julian Huxley.