An odor or fragrance (commonly referred to as a smell) is caused by one or more volatilized chemical compounds, generally at a very low concentration, that humans or other animals perceive by the sense of olfaction. Odors are also commonly called scents, which can refer to both pleasant and unpleasant odors. The terms fragrance and aroma are used primarily by the food and cosmetic industry to describe a pleasant odor, and are sometimes used to refer to perfumes. In contrast, malodor, stench, reek, and stink are used specifically to describe unpleasant odor.
In the United Kingdom, odour refers to scents in general. In the United States, odor has a more negative connotation, such as smell, stench or stink, while scent or aroma are used for pleasant smells.
Read more about Odor: Basics, Measurement, In The Indoor Environment, Legislative Provisions, Adsorption As Separating Process, Types, Behavioral Cues, See Also
Famous quotes containing the word odor:
“Moisture and color and odor thicken here.
The hours of daylight gather atmosphere.”
—Robert Frost (1874–1963)
“The spring over there takes you by the throat, the flowers blooming by the thousands over white walls. If you strolled around for an hour in the hills surrounding my town, you would return with the odor of honey in your clothes.”
—Albert Camus (1913–1960)
“There is no odor so bad as that which rises from goodness tainted. It is human, it is divine carrion.”
—Henry David Thoreau (1817–1862)