In painting and sculpture biomorphic forms or images are ones that, while abstract, nevertheless refer to, or evoke, living forms such as plants and the human body. The term comes from combining the Greek words bios, meaning life, and morphe, meaning form. Biomorphic seems to have come into use around the 1930s to describe the imagery in the more abstract types of Surrealist painting and sculpture particularly in the work of Joan Miró and Jean Arp (see automatism). Henry Moore and Barbara Hepworth also produced some superb biomorphs at that time, and later so did Louise Bourgeois.