What does olfaction mean?
Olfaction is the technical term for the sense of smell and the biological process by which airborne odor molecules are detected and interpreted. Specialized receptor cells in the nasal cavity respond to these molecules and transmit signals through the olfactory system, allowing people and animals to identify odors and use them as clues about food, danger, identity, and surroundings. The word is especially common in medicine, anatomy, psychology, and environmental science; clinicians may discuss impaired or lost olfaction, while researchers may examine differences in human and animal olfaction. Although the term can sound clinical, it is broader than simply naming a smell: it denotes both the sensory experience and the underlying physiological machinery. In ordinary conversation, "smell" and "sense of smell" are more natural, but olfaction is useful when scientific precision is required.
nounOlfaction is the biological process by which odors are detected and perceived through the sense of smell. In medicine and biology, it also refers to the sensory capacity or function of the nose and olfactory system.
- The physiological process of detecting and perceiving odors through the sense of smell.
- The sensory capacity or function of the nose and olfactory system.
"A head injury left him with a marked loss of olfaction."
"Dogs rely on olfaction to locate prey and recognize other animals."
"The study measured how pollution affects human olfaction."
The plural is grammatically possible but rarely used; the singular is normally preferred even when several organisms or systems are being discussed.
"The researchers compared the olfactions of several species."
Olfaction is smell as science studies it: the process, not merely the odor.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does olfaction come from?
Olfaction entered English in the 17th century from Latin olfaciō, a noun meaning "the act of smelling," formed from olfacere, "to smell." The Latin verb belongs to the same inherited family as odor, meaning "smell" or "scent," and related English words such as odorous and odorless. Its derivatives olfactory and olfactive likewise refer to the organs, nerves, or sensations associated with smell.
Related word forms
How olfaction is actually used
Chiefly formal or scientific. In everyday speech, people normally say "smell" or "sense of smell" rather than "olfaction."