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.

abreaction n.

the release of strong emotion associated with buried memory.

abutment n.

a component of a dental bridge or implant.

acantha n.

a spine projecting from a vertebra.

acapnia n.

a condition in which there is an abnormally low concentration of carbon dioxide in the blood

acaricide n.

any chemical agent used for destroying mites and ticks.

accident n.

a traumatic incident involving any part of the body.

acentric n.

a chromosome or fragment of a chromosome that has no centromere.

aceton n.

an organic compound that is an intermediate in many bacterial fermentation and is produced by fatty acid oxidation.

acholia n.

absence or deficiency of bile secretion or failure of the bile to enter the alimentary canal.

achylia n.

absence of secretion.

acidosis n.

a condition in which the acidity of body fluids and tissue is abnormally high.

acne n.

a common inflammatory disorder of the sebaceous glands.

acrosome n.

the cap like structure on the front end of a spermatozoon.