Odor
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An odor or odour is a smell or a scent caused by one or more volatilized chemical compounds generally found in low concentrations that humans and many animals can perceive via their olfactory system.
"Smell", from Allegory of the Senses by Jan Brueghel the Elder, Museo del Prado
Odor control covers at a sewage treatment plant: Under these covers, grit and gravel are settled out of the wastewater.
Two dogs sniffing each other
Sense of smell
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The sense of smell, or olfaction, is the special sense through which smells are perceived. The sense of smell has many functions, including detecting desirable foods, hazards, and pheromones, and play
Odor
…Machine olfaction – Simulation of the sense of smell Olfaction – Sense that detects smells Olfactometer – Instrument used to detect and measure odor dilution…
Painting of a woman smelling a carnation. Olfaction uses chemoreceptors that create signals processed in the brain that form the sense of smell.
The Lady and the Unicorn, a Flemish tapestry depicting the sense of smell, 1484–1500. Musée national du Moyen Âge, Paris.