Category: S

  • Shift to the right

    In hematology, an increase in the number of older polymorphonuclear leukocytes in the blood.  

  • Shift to the left

    In hematology, an increase in the number of immature polymorphonuclear leukocytes in the blood.  

  • Sherrington phenomenon

    Contraction of denervated skeletal muscle by stimulating autonomic cholinergic fibers innervating its blood vessels.  

  • Shenton’s line

    A radiographical line used to determine the relationship of the head of the femur to the acetabulum. The line follows the inferior border of the ramus of the pubic bone and continued outward follows the curve down the medial border of the neck of the femur.  

  • Shellac

    A refined resinous substance obtained from plants that contain the secretions of certain insects. It is used in paints, varnishes, dry compounding, and in dentistry.  

  • Shell

    A hard covering, as that for an egg or turtle. The clamp that presses the hair against the barrel or rod of a thermal iron. A collective assembly of electrons that constitute a portion of the outer arrangement of an atom, sharing a common energy level.  

  • Shelf-life extension

    Preservation of the purity and potency of a therapeutic agent  

  • Sheep cell agglutination test

    A test for rheumatoid factor in serum. Sheep erythrocytes sensitized with rabbit antisheep erythrocyte immune globulin will be agglutinated if serum containing the rheumatoid factor is added.  

  • Shedding

    A colloquial term for the loss of deciduous teeth.  

  • Shear

    A frictional force per unit of surface area applied parallel to the planes of any object. The term describes the movement that transpires when two surfaces glide in opposing directions.