lagomorphZool.|ˈlægəmɔːf| [f.Gr. λαγώ-ς hare + µορϕή form.] One of the Lagomorpha, a group of rodents of which the hares form one family. Hence lagoˈmorphica., having the form and structure of a hare. 1882Pop.Sci. Monthly XX. 423 The lagomorphs (hares), almost exclusively of the northern hemisphere.