Definition
An adverse effect on any living organism in which symptoms develop slowly over a long period of time or recur frequently.
See also:
Acute Effect
An adverse effect on any living organism in which severe symptoms develop rapidly and often subside after the exposure stops.
Acute Toxicity
Adverse effects that result from a single dose or single exposure of a chemical; any poisonous effect produced within a short period of time, usually less than 96 hours. This term normally is used to describe effects in experimental animals.
Dose
In terms of monitoring exposure levels, the amount of a toxic substance taken into the body over a given period of time.