Category: S

  • Successful aging

    Aging in which emotional, intellectual, physical, social, or spiritual interests are optimally maintained or developed.  

  • Secondary aging

    Changes in structure and function due to diseases prevalent in aging rather than to universal aging processes.  

  • Staff of aesculapius

    A rod or crude stick with a snake wound around it, used to signify the art of healing and adopted as the emblem of some medical organizations (e.g., American Medical Association). Snakes were sacred to Aesculapius because they were believed to have the power to renew their youth by shedding their old skin and growing…

  • Synergistic action

    The ability of a drug or muscle to aid or enhance the action or effect of another drug or muscle; opposite of antagonistic action.  

  • Specific action

    The particular action of a drug on another substance or on an organism or part of that organism.  

  • Sparing action

    The effect of a nonessential nutrient in the diet such that it decreases the requirement for an essential nutrient. For example, protein is especially important for tissue growth and development in children. If protein intake is sufficient but caloric intake is inadequate, a protein deficiency will develop. In this situation, the addition of sufficient carbohydrates…

  • Summer acne

    Acne that appears only in hot, humid weather or that is much worse in such weather. Although the exact cause is unknown, the condition is not caused by increased exposure to the sun’s rays.  

  • Steroid acne

    Acne caused by systemic or topical use of corticosteroid drugs.  

  • Sulfurous acid

    An inorganic acid, H2S03. It is a powerful chemical reducing agent that is used commercially, especially for its bleaching properties.  

  • Sulfosalicylic acid

    A crystalline acid soluble in water or alcohol; used as a reagent for precipitating proteins, as in testing for albumin in urine.