Category: D

  • Directionality problem

    A difficulty in correlational research whereby it is known that two variables are related, but it is unclear which is causing the other.  

  • Directionality

    Awareness of laterality and verticality, as well as the ability to translate this discrimination within the organism to similar discrimination among objects in space. The ability to perceive one’s position in relation to the environment; the sense of direction. Problems with directionality are frequently found in children with learning disabilities or suspected minimal brain dysfunction.…

  • Direct health teaching

    Direct health experiences.  

  • Direct health experiences

    Planned and deliberate health education under the guidance of a trained health educator.  

  • Direct euthanasia

    The process of inducing death, often through the injection of a lethal drug.  

  • Directed thinking

    Thinking that is aimed at the solution of a problem.  

  • Direct contact

    A means of transmitting a communicable disease directly by touching or being touched by an infected person. A situation where someone or something physically touches an infected person or object. Transmission of a communicable disease from the host to a healthy person by way of body fluids (e.g., respiratory droplets, blood, or semen), cutaneous contact,…

  • Direct calorimetry

    The determination of the amount of heat released by the body. The measurement of heat produced by a body or the combustion of food through the use of a calorimeter. A technique employed in scientific experimentation which involves the direct quantification of the amount of thermal energy generated by an organism during its metabolic processes.…

  • Diplonema

    That stage in prophase of meiosis following the pachytene stage, but preceding diakinesis, in which the chromosomes are visibly double, characterized by centromere repulsion of bivalents resulting in the formation of loops.  

  • Diplomate

    A physician who holds a certificate of the National Board of Medical Examiners or one of the American Boards of the Specialties, Board Eligible; Board Certified. Somebody who has a diploma; sometimes used to describe a board certified physician, because a diploma is given with certification, and in other similar situations. Specialist whose competence has…