Glossary

The base 8 number system. Digits are 0, 1, 2, 3, 4, 5, 6, & 7.

Office of Cellular, Tissues and Gene Therapies (FDA)

Outside Diameter

Orphan Drug Act

Open Database Connectivity

Object Database Management System

The lowest concentration of a substance in air that can be smelled. For a given chemical, different people usually have very different odor thresholds. If a chemical’s odor threshold is lower than the amount that is hazardous, the chemical is said to have good warning properties. One example is ammonia. Most people can smell it at 5ppm, below the PEL of 25ppm.

Ozone Depletion Potential

Office of Dietary Supplements (NIH)

Office of Drug Safety (CDER) - Formerly OPDRA

Orally Disintegrating Tablets

Occupational Exposure Bands

Organization for Economic Co-Operation and Development

Overall Equipment Effectiveness

Official Establishment Inventory

Operator Exposure Level

Occupational Exposure Limit

Original Equipment Manufacturer

A measurement of face-to-face squareness.

A measurement of the offset between port centerlines or two planes.

The use of an FDA approved drug or device for a purpose other than that intended by the manufacturer and described on the label.

Many drugs/devices that have gained FDA approval have uses other than those for which the drug/device was officially evaluated and approved. Once a drug/device has been approved for some use, however, it can be legally prescribed for any use. Any use, other than the FDA approved use (as stated on the labeling), is considered off-label use.

In water monitoring systems ̶ Referring to measurement devices that are not directly coupled to the water stream.(also see: In-Line, On-Line)

The office within the National Institutes of Health, an agency of the Public Health Service, Department of Health and Human Services, responsible for issuing Assurances and overseeing research institution’s compliance with the DHHS regulations.