Wordnet polsko-angielski 
                         (failure of some tissue or organ to develop) 
aplasia 
Słownik medyczny polsko-angielski Iwona Kienzler
                        aplasia n
Wielki słownik medyczny polsko-angielski 2011 r., Anna Słomczewska
                        aplasia, congenital absence or defective development of an organ, in h (a) ematology cessation of the usual regenerative process