A dose or exposure below which there is no measurable adverse effect.

The lowest dose of a chemical at which a specified measurable effect is observed and below which it is not observed.

The contaminant dose or exposure level below which there is no expected significant effect.

The lowest chemical dose at which a specified measurable effect is observed and below which it is not observed. The dose or exposure level below which a significant adverse effect is not expected.

an amount below which no damage is evident

The lowest dose or exposure to a chemical at which a specific effect is observed.

Each topic may route trace messages to one or more destinations. Each topic/destination connection has an associated threshold. Messages with levels below the threshold are not passed on to the destination.

Dose or exposure concentration of anagent below which a stated effect is not observed or expected to occur.

The level of exposure above which adverse health effect is thought to occur, and below which no adverse effect is thought to occur.

A level of chemical exposure below which there is no adverse effect and above which there is a significant toxicological effect.

Dose of a substance or exposure concentration below which a stated effect is not observed or expected to occur (disease). [5

The heart rate at which lactic acid begins to build up faster than you can break it down. You should do the bulk of your training at just below that level.

The dose or exposure below which no deleterious effect is expected to occur.

The point below which an utterance is rejected as unrecognized.