het·ero·blas·tic \|hed.ərō|blastik\adjective Etymology:heter- + -blastic 1.: having an indirect embryonic development — opposed to homoblastic; compare embryogeny 2.: arising from different germ layers — used of functionally similar organs of related animals 3.: having young and adult forms different < heteroblastic leaves of flowering plants > • het·ero·blas·ty\ˈ ̷ ̷ ̷ ̷ ̷ ̷ˌblastē\noun-es