Category: A

  • Acanthocephala

    A phylum of parasitic worms. Their usual hosts are fish and birds.  

  • Acanthesthesia

    A sensation as of a pinprick; a form of paresthesia.  

  • Acampsia

    Inflexibility of the joints of a limb; rigidity; ankylosis.  

  • Academic dishonesty

    Intentional participation in deceptive practices in one’s academic work or the work of others. Examples include cheating, fraud, plagiarism, or falsification of research results.  

  • Abstraction

    Removal or separation of a constituent from a mixture or compound.  

  • Absorption lines

    In spectroscopy, dark lines of the solar spectrum. A black line in the continuous spectrum of light passing through an absorbing medium.  

  • Absolute risk increase

    A measure of the negative effect of an intervention or treatment in a clinical trial. It consists of the number of adverse events found in the experimental group, minus the number of adverse events in the control group. It is the opposite of the “absolute benefit increase.”  

  • Absolute benefit increase

    The beneficial effect of an intervention or treatment in a clinical trial. It consists of the number of events observed in the experimental cohort minus the number of events in the control group. The term is the opposite of the “absolute risk increase.”  

  • Absinthism

    Deterioration of the nervous system following excessive use of absinthe.  

  • Absence

    Brief temporary loss of consciousness, as may occur in petit mal epilepsy. In medical terminology, there is a transient absence or reduction of consciousness observed in certain types of epilepsy, particularly generalized absence (petit mal) seizures experienced during childhood.