Lorande Loss Woodruff (July 14, 1879 – June 23, 1947) was an American biologist, professor of protozoology at Yale University, and author of the textbook Foundations of Biology, which went through 6 editions and was widely used in the 1920s and 1930s. He was elected in 1908 a Fellow of the American Association for the Advancement of Science and in 1924 a Member of the U.S.