aplastic a·plas·tic (ā-plās'tĭk, ə-plās'-)
Unable to form or regenerate tissue.
Of, relating to, or characterized by aplasia.
aplasia a·pla·si·a (ə-plā'zē-ə, -zhə)
Congenital absence of an organ or tissue.
Incomplete, retarded, or defective development of an organ or tissue.
Cessation of the usual regenerative process in an organ or tissue.