Any bodily disorder, especially regarding the blood.
Imbalance of the four bodily humors (blood, black and yellow bile, phlegm) that was thought to cause disease.
An occurrence of illness or disease, or a single symptom of that illness.
The quality of being unhealthful or diseased, sometimes including the cause.
The quality of being morbid; an attitude or state of mind marked by gloom.
Adverse effects caused by a medical treatment such as surgery.
The incidence of a disease, as a rate of a population which is affected.
The sickness rate of a population.