Category: S

The senses of sight, touch, hearing, equilibrium, smell, and taste.  

The sense by which people recognize objects in space, their relationship, and their dimensions.  

A sensation that does not result from any external stimulus and is perceptible only by the subject.  

Improvement in near vision of old people. Usually precedes the development of nuclear cataract.  

Anthraquinone glucosides present in senna that are used as cathartics.  

A form of ehrlichiosis first identified in Japan, transmitted to humans by tick bite or, possibly, consumption of infected raw fish, and caused by Ehrlichia sennetsu. Symptoms include fever, malaise, backache, and lymphadenopathy.  

Easy for senior citizens to use, e.g., certain forms of medication packaging.  

The dried root of the North American perennial herb, Polygala senega, traditionally used to treat asthma, bronchial infection, and pneumonia.  

The fusiform muscle of the posterior and inner part of the thigh.  

The chemical alteration of a portion of a natural substance.