资料来源 : pyDict

发育不全

资料来源 : Webster's Revised Unabridged Dictionary (1913)

Aplasia \A*pla"si*a\, n. [NL.; Gr. ? priv. + ? a molding.]
   (Med.)
   Incomplete or faulty development.

资料来源 : WordNet®

aplasia
     n : failure of some tissue or organ to develop