Orthotropic may refer to:
Orthotropic material is one that has different material properties or strengths in different orthogonal directions (e.g., glass-reinforced plastic, or wood) Orthotropic deck, in bridge design, is one made from solid steel plate Orthotropic movement, in botany, is a type of tropism along the same axis as the stimulus Orthotropics, a method claimed to be able to guide facial growth