Category: D

  • Defense reaction

    A mental response whose purpose (according to classical psychoanalysis) is to protect the ego.  

  • Defense-oriented response

    A coping mechanism in which a person tries to protect him- or herself from anxiety or psychological harm.  

  • Defecography

    Radiography of the anorectal region after instillation of a barium paste into the rectum. The defecation process is imaged by direct filming or video recording.  

  • De-escalate

    To defuse a potentially dangerous interaction between two or more individuals.  

  • Deer fly

    A biting fly, Chrysops discalis, that transmits the causative organism of deer fly fever, a form of tularemia.  

  • Deepening

    In hypnotherapy, achieving a more relaxed or receptive state of mind.  

  • Deep bite

    In orthodontics, a colloquial term for a pathological overbite. A condition characterized by a closed bite, wherein there is a pronounced or excessive overlap of the upper and lower teeth, with the lower incisors biting too closely to or even into the gum tissue or palate located behind the upper teeth.  

  • Deduction

    Reasoning from the general to the particular.  

  • Dedifferentiation

    The return of parts to a homogeneous state.  

  • Decussation of pyramids

    Crossing of fibers of pyramids of the medulla oblongata from one pyramid to the other.