Category: C

  • Clonal selection theory of immunity

    The theory that precursor cell lines for lymphocytes are made up of innumerable clones with identical antigen receptors. The clones capable of reacting with “self’ components (i.e., the individual’s own cells) are eliminated or suppressed in the prenatal period. Those clones not eliminated or suppressed react only with specific foreign antigens that fit their receptors,…

  • Cryptogenic tetanus

    Tetanus in which the site of entry of the organism is not known.  

  • Chronic tetanus

    A latent infection in a healed wound, reactivated on opening the wound.  

  • Cephalic tetanus

    A form of tetanus due to a wound of the head, esp. one near the eyebrow. It is marked by trismus, facial paralysis on one side, and pronounced dysphagia. It resembles rabies and is often fatal.  

  • Ceasmic teratism

    Teratism in which a normal union of parts fails to occur (e.g., as in spina bifida or cleft palate).  

  • Cool mist tent

    An enclosure into which nebulized medications and mist are sprayed; it is used to treat croup, asthma, and other respiratory illnesses in children.  

  • Central tendon

    The central portion of the diaphragm, consisting of a flat aponeurosis into which the muscle fibers of the diaphragm are inserted.  

  • Critical temperature

    The temperature above which distinct liquid and gas phases do not exist. The temperature at which a gas can be compressed into a liquid by applying pressure.  

  • Compensatory technique

    The use of modified procedures or assistive devices to enable the successful performance of tasks by persons with a disability.  

  • Crocodile tear

    Tears and excessive saliva produced during eating. This condition is present when nerve fibers of the salivary glands grow abnormally into the lacrimal glands following Bell’s (seventh nerve) palsy.