Noun miscarriage has 2 senses
  1. miscarriage, abortion - failure of a plan
    --1 is a kind of failure
    Derived form: verb miscarry1
  2. spontaneous abortion, miscarriage, stillbirth - a natural loss of the products of conception
    --2 is a kind of abortion
    --2 has particulars:
     habitual abortion; imminent abortion, threatened abortion; incomplete abortion, partial abortion
    Derived form: verb miscarry2