- A period (originally 40 days) of detention of vessels and their passengers coming from an area where an infectious disease prevails.
- To detain such vessels and their passengers until the incubation period of an infectious disease has passed.
- A place where such vessels and their passengers are detained.
- The isolation of a person with a known or possible contagious disease.
[It. quarantina fr. L. quadraginta, forty]
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Examples: glitazone, GI cocktail, etc.