olfacto-, olfact-

(Latin: to smell; pertaining to the sense of smell; scent; to cause to smell at)

From Latin olfactorius, from olfactus, olfacere, "to get the smell of, to sniff"; from olere, "to smell" + facere, "to make, to do".

olfactory disorder (s) (noun), olfactory disorders (pl)
Abnormal smelling which includes a loss of the ability to smell or a change in the way odors are perceived.

As for changes in the perceptions of olfactory disorders, some people notice that familiar odors become distorted, or an odor that usually smells pleasant instead smells foul.

Olfactory disorders have many causes.

Most people who develop an olfactory disorder have recently experienced an illness or an injury.

Common triggers for olfactory disorders are colds and other upper respiratory infections and head injuries.

Among other causes of olfactory disorders are polyps in the nasal cavities, sinus infections, hormonal disturbances, or dental problems.

Exposure to certain chemicals; such as, insecticides and solvents, and some medications have also been associated with olfactory disorders.

People with head and neck cancers who receive radiation treatment are also among those who experience problems with olfactory disorders.

Olfactory disorders can have serious consequences; for example, the sense of smell often serves as a first warning signal, alerting us to the smoke of a fire or the odor of a natural gas leak and dangerous fumes.

Perhaps more important is that our chemosenses are sometimes a signal of serious health problems. Obesity, diabetes, hypertension, malnutrition, Parkinson's disease, Alzheimer's disease, multiple sclerosis, and alcoholic psychosis are all accompanied or are signaled by chemosensory problems resulting in olfactory disorders.

—Based on information from
Websters' New World Medical Dictionary;
as seen in MedicineNet.com
olfactory epilepsy (s) (noun), olfactory epilepsies (pl)
A sudden disagreeable sensation of smell, or odor, preceding or characterizing an epileptic attack
olfactory esthesioneuroma (s) (noun phrase); olfactory esthesioneuromas (pl)
A slow growth of a malignant tumor in the nerve tissue of the nasal area: Dr. Gibson, the ear, nose, and throat specialist, was treating Ron for the olfactory esthesioneuroma detected in passages of his nose.
olfactory nerve (s) (noun), olfactory nerves (pl)
Any of the nerves supplying the nasal mucosa: These olfactory nerves consist of delicate bundles of fibers that pass through the bipolar receptor neurons of olfactory mucous membranes.
olfactory neurons (pl) (noun)
Sensory neurons are in the lining of the nose: The olfactory neurons are the only ones that continue to divide and differentiate throughout an organisms life.
olfactory organ (s) (noun), olfactory organs (pl)
The part of the body that is involved in the detection of smells which consist of a group of sensory receptors that respond to air-borne or water-borne chemicals: Vertebrates possess a pair of olfactory organs in the mucous membrane lining the upper part of the nose, which opens to the exterior via the external nostrils.

Chemicals from the environment are dissolved in the mucus secreted by the olfactory organs and is transmitted to the brain by the receptors via the olfactory nerve.

Olfactory organs are found on the antennae in insects and in various positions in other invertebrates.

olfactory region of nasal mucosa, region of olfactory mucosa
The specialized olfactory receptive area that includes the upper one-third of the nasal septum and the lateral wall above the superior concha and is lined with olfactory mucosa.
olfactus (adjective), more olfactus, most olfactus
A reference to or a description of the sense of smell.
olfacty (s) (noun), olfacties (pl)
The unit of smell or the threshold of the point at which the odor is just received.

Inter-related cross references, directly or indirectly, involving word units meaning "smell, odor": arom-; brom-; odor-, odori-; osmo-; osphresio-; ozon-.