D defs.my
Entry 1 sense Webster, 1913

Malformation

/mălˌ-fôr-māsh'-ən/ · Mal·for·ma·tion · IPA /mˌælfɔrmˈeɪʃən/
01 n. Ill formation; irregular or anomalous formation; abnormal or wrong conformation or structure; -- often used of body parts such as limbs whi…
  1. 1.
    Ill formation; irregular or anomalous formation; abnormal or wrong conformation or structure; -- often used of body parts such as limbs which do not develop properly during fetal maturation.