Author: Glossary

  • Platyhelminthes

    A phylum of flatworms including the classes Turbellaria, Trematoda (flukes), and Cestoidea (tapeworms). The last two are parasitic and include many species of medical importance. A group of worms that are flat-bodied and elongated.  

  • Platyhelminth

    The common name for any flatworm.  

  • Platycnemia

    The condition of having an unusually broad tibia.  

  • Platycephalic

    Having a wide skull with a vertical index less than 70.  

  • Platybasia

    A developmental defect of the skull in which the floor of the posterior fossa of the skull around the foramen magnum protrudes upward.  

  • Platinous

    A compound containing divalent platinum.  

  • Platinosis

    Cutaneous and respiratory allergic reactions to exposure to complex salts of platinum.  

  • Plating

    In bacteriology, inoculation of liquefiable, solid media (gelatin or agar) with microorganisms and pouring of medium into a shallow flat dish.  

  • Platelet transfusion refractoriness

    A failure of circulating platelet levels to rise after platelet transfusion. Alloimmunization against platelet antigens, disseminated intravascular coagulation, fever, hypersplenism, and sepsis are among the potential causes. A typical platelet transfusion should normally raise platelet counts by more than 20,000 platelets/microliter.  

  • Plateletpheresis

    The separation of platelets from other components of whole blood (e.g. for use in transfusion or to treat hematologic disease).