pla·gi·o·trop·ic \|plājēō.|träpik\adjective Etymology: International Scientific Vocabulary plagi- + -tropic; originally formed as German plagiotropisch : having the longer axis inclined away from the vertical < plagiotropic roots and lateral branches > — compare orthotropic • pla·gi·o·trop·i·cal·ly\-pə̇k(ə)lē\adverb