Adverse effect: A harmful or abnormal result. An adverse effect may be caused by administration of a medication or by exposure to a chemical and be indicated by an untoward result such as by illness or death.
- Adverse event
Adverse event: In pharmacology, any unexpected or dangerous reaction to a drug or vaccine.
- Adverse reaction
Adverse reaction: In pharmacology, any unexpected or dangerous reaction to a drug. An unwanted effect caused by the administration of a drug. The onset of the adverse reaction may be sudden or develop over time. Also called an adverse drug event (ADE), adverse drug reaction (ADR), adverse effect or adverse event.
- ADA (American Dental Association)
ADA (American Dental Association): The mission statement of the ADA reads as follows: “The ADA is the professional association of dentists dedicated to serving both the public and the profession of dentistry. The ADA promotes the public’s health through commitment of member dentists to provide quality oral health care, accessible to everyone. The ADA promotes […]
Ad-: Prefix indicating toward or in the direction of. For example, adduction is the movement of a limb toward the midline of the body, and adrenal literally means ‘toward the kidney.’
- Ad lib
Ad lib: Abbreviation for the Latin “ad libitum” meaning “at pleasure” and “at one’s pleasure, as much as one desires, to the full extent of one’s wishes.” Sometimes seen on a prescription or doctor’s order. For example, during an overnight fast when the patient is not to eat any food but can have water, the […]