Category: S

  • Spreading factor

    The hyaluronidase made by Bacillus anthracis, the bacteria that causes anthrax.  

  • Sympathizing eye

    In sympathetic ophthalmia, the uninjured eye, which reacts to the pathological process in the injured eye.  

  • Squinting eye

    An eye that deviates from the object of fixation in strabismus.  

  • Solid extract

    An extract made by evaporating the fluid part of a solution.  

  • Soft extract

    An extract with the consistency of honey.  

  • Stretching exercise

    A therapeutic exercise maneuver, using physiological principles, designed to increase joint range of motion or extensibility of pathologically shortened connective tissue structures.  

  • Sister chromatid exchange

    The exchange of corresponding parts of homologous maternal and paternal chromosomes during the first meiotic division. This contributes to genetic diversity in the offspring.  

  • Serum eruption

    An eruption that occurs following the injection of serous fluid. It may be accompanied by chills, fever, and arthritic symptoms.  

  • Seabather’s eruption

    Itching red papules that may appear on the skin within a few hours of swimming in saltwater. The rash is caused by the sting of the larval forms of the thimble jellyfish or the sea anemone. The rash is usually more prominent under swimsuits than on exposed skin because the pressure of clothing on the…

  • Systematic error

    The residual error after random error has been subtracted from total error.