hemimetaˈmorphic,a.Biol. [f. hemi- + metamorphic.] = hemimetabolic. Hence hemimetamorˈphosis, incomplete or partial metamorphosis; hemimetaboly. 1880Day Fishes Gt.Brit. I. Introd. 91 In some pelagic forms Hemimetamorphosis may occur, or very considerable alterations in their growth and development.