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odour
Definition
Odour is a word we use to describe the smell of something. It is a chemical signal that is released by an object and detected by our noses.
Odours are caused by molecules that are released from objects. These molecules are called volatile organic compounds (VOCs). VOCs are small enough to travel through the air and reach our noses.
Our noses have special receptors that can detect VOCs. When a VOC binds to a receptor, it sends a signal to our brain. This signal is what we perceive as an odour.
Different objects release different VOCs, which is why different objects have different odours. For example, a rose releases VOCs that smell like flowers, while a skunk releases VOCs that smell like rotten eggs.
How can the word be used?
The sense of smell is one of the five senses.
Different forms of the word
Noun: A distinctive smell, typically pleasant.
Verb: To emit an odour.
Adjective: Having a strong or unpleasant odour.
Etymology
The word "odour" comes from the Old French word "odour," which is also the source of the Dutch word "geur" and the German word "Geruch." The Old French word "odour" is thought to be derived from the Latin word "odor," which means "smell.".
The word "odour" was first used in English in the 14th century. It was used to refer to a distinctive smell, typically pleasant.
Question
What can create an odour?