abnormalcy - an abnormal physical condition resulting from defective genes or developmental deficiencies

acardia - congenital absence of the heart (as in the development of some monsters)

acorea - absence of the pupil in an eye

acromicria, acromikria - abnormally small extremities (underdeveloped fingers and toes)

acromphalus - abnormal protrusion of the navel; sometimes the start of umbilical hernia

amastia - absence of the mammary glands (either through surgery or developmental defect)

aneuploidy - an abnormality involving a chromosome number that is not an exact multiple of the haploid number (one chromosome set is incomplete)

asynclitism, obliquity - the presentation during labor of the head of the fetus at an abnormal angle

atresia - an abnormal condition in which a normal opening or tube in the body (as the urethra) is closed or absent

deviated septum - abnormal displacement of any wall that separates two chambers (usually in the nasal cavity)

dextrocardia - abnormal condition where the heart is located toward the right side of the chest

ectrodactyly - congenital abnormality involving the absence of some fingers or toes

erethism - an abnormally high degree of irritability or sensitivity to stimulation of an organ or body part

fetal distress, foetal distress - an abnormal condition of a fetus; usually discovered during pregnancy and characterized by an abnormal heart rhythm

inversion - abnormal condition in which an organ is turned inward or inside out (as when the upper part of the uterus is pulled into the cervical canal after childbirth)

pneumothorax - abnormal presence of air in the pleural cavity resulting in the collapse of the lung; may be spontaneous (due to injury to the chest) or induced (as a treatment for tuberculosis)

hydatid mole, hydatidiform mole, molar pregnancy - an abnormality during pregnancy; chorionic villi around the fetus degenerate and form clusters of fluid-filled sacs; usually associated with the death of the fetus

hydramnios - an abnormality of pregnancy; accumulation of excess amniotic fluid

hypervitaminosis - an abnormal condition resulting from taking vitamins excessively; can be serious for vitamins A or D or K

hypospadias - an abnormal condition in males in which the urethra opens on the under surface of the penis

lagophthalmos - abnormal condition in which an eye cannot close completely

nanophthalmos - condition in which both eyes are abnormally small but otherwise normal

palmature - an abnormality in which the fingers are webbed

dysplasia - abnormal development (of organs or cells) or an abnormal structure resulting from such growth

hydrocephalus, hydrocephaly - an abnormal condition in which cerebrospinal fluid collects in the ventricles of the brain; in infants it can cause abnormally rapid growth of the head and bulging fontanelles and a small face; in adults the symptoms are primarily neurological

abrachia - the condition of having no arms

progeria - a rare abnormality marked by premature aging (grey hair and wrinkled skin and stooped posture) in a child

cyclopia - a developmental abnormality in which there is only one eye

subnormality - the state of being less than normal (especially with respect to intelligence)

anomalousness, anomaly - deviation from the normal or common order or form or rule

gynecomastia - excessive development of the breasts in males; usually the result of hormonal imbalance or treatment with certain drugs (including some antihypertensives)