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Term Definition
Obsessive compulsive disorder (OCD)

Anxiety disorder in which people have thoughts, feelings, ideas, sensations, or behaviors that make them feel driven to do something.

Oppositional defiant disorder

A pattern of disobedient, hostile, & defiant behaviors towards authority figures.

Oral medication

Medication taken by mouth.

Oral motor therapy

Therapy directed at improving oral awareness, muscle strength, range of motion, and coordination.

organ abscesses

Pocket of fluid in kidney or other organ may or may not be an infection.


Custom made mechanical device to correct a problem with body strength or structure.

Otoacoustic emissions

A tiny sound reflected back out of the ear in response to a loud noise. Used for hearing diagnosis.

Over-pronated foot/feet

An abnormal rotation of the ankle.


The Centers for Disease Control and Prevention (CDC) states that a BLL of 10 _g/dL or above is a cause for concern. However, lead can impair development even at BLLs below 10 _g/dL.