Category: A

  • Chemical attraction

    The tendency of atoms of one element to unite with those of another to form compounds.  

  • Atticoantrotomy

    Surgical opening of the attic and mastoid antrum of the ear.  

  • Atticitis

    Inflammation of the attic of the ear.  

  • Attic disease

    Chronic inflammation of the attic of the ear.  

  • Attic

    The cavity of the middle ear or the portion lying above the tympanic cavity proper. It contains the head of the malleus and the short limb of the incus.  

  • Attending

    The person having primary responsibility for a patient.  

  • Attendant

    A paramedical hospital employee who assists in the care of patients.  

  • Atrium of the heart

    The upper chamber of each half of the heart. The right atrium receives deoxygenated blood from the entire body (except lungs) through the superior and inferior venae cavae and coronary sinus; the left atrium receives oxygenated blood from the lungs through the pulmonary veins. Blood passes from the atria to the ventricles through the atrioventricular…

  • Atrium of the ear

    A chamber or cavity communicating with another chamber or passageway.  

  • At-risk drinking

    The consumption of a potentially unhealthy amount of alcohol. Men are said to participate in at-risk drinking when they consume more than four alcoholic drinks a day (or 14 or more drinks a week). At-risk drinking for women consists of the consumption of more than three drinks a day, or seven or more drinks a…