abarticulation n.

the dislocation of a joint.

abasa n.

an inability to walk for which no physical cause can be identify.

abdomen n.

the part of the body cavity below the chest.

abiotrophy n.

degeneration or loss of function without apparent cause.

ablation n.

the removal of tissue, a part of the body or an abnormal growth.

abortion n.

the expulsion or removal of an embryo or fetus from the uterus at a stage of pregnancy.

abrasion n.

a graze.