Author: Glossary
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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.
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Platyhelminth
The common name for any flatworm.
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Platycnemia
The condition of having an unusually broad tibia.
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Platycephalic
Having a wide skull with a vertical index less than 70.
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Platybasia
A developmental defect of the skull in which the floor of the posterior fossa of the skull around the foramen magnum protrudes upward.
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Platinous
A compound containing divalent platinum.
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Platinosis
Cutaneous and respiratory allergic reactions to exposure to complex salts of platinum.
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Plating
In bacteriology, inoculation of liquefiable, solid media (gelatin or agar) with microorganisms and pouring of medium into a shallow flat dish.
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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.
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Plateletpheresis
The separation of platelets from other components of whole blood (e.g. for use in transfusion or to treat hematologic disease).