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Odour threshold
In principle, the lowest concentration of an odorant in the air that can be detected by a human being.
Note: In practice, a panel of "sniffers" is often used, and the threshold taken as the concentration at which 50% of the panel can detect the odorant (although some workers have also used 100% thresholds). The odour concentration at the detection threshold may be defined as one odour unit.
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- Part of Speech: noun
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- Industry/Domain: Biology; Chemistry
- Category: Toxicology
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