Some abnormal levels may mean there is a problem with the development of the brain and nerves.

It is normal for college students, especially freshmen, to feel abnormal levels of stress.

She was placed under investigation on a positive test for abnormal levels of testosterone.

The demand for good food in the Hamptons has reached an abnormal level.

Appropriate treatment is applied to the water source once abnormal levels of bacterial activity are noticed.

Blood testing is also used to look for abnormal levels of fetal protein or hormones.

If a person has abnormal levels of blood proteins, then the plasma calcium may be inaccurate.

Direct scaling cannot be used to determine if a taste stimulus is being perceived at abnormal levels.

If the engine overspeeds, the air flow through the intake will rise to an abnormal level.

With breast cancer, for instance, only 28 percent of patients produced abnormal levels of the protein, the study said.