Category: O

  • Orbiculus

    Muscle surrounding an orifice; a sphincter muscle.  

  • Orality

    The oral stage of psychosexual development, which involves sucking or chewing on objects other than food.  

  • Oralism

    The instruction of hearing-impaired students with speech or speech reading rather than with signed or finger-spelled words.  

  • Oral glucose tolerance test

    A screening test for diabetes mellitus (DM), in which plasma glucose levels are measured after the patient consumes an oral glucose load. In screening patients for type 2 DM, measuring fasting plasma glucose levels generally is preferable to an OGTT because the fasting blood test is simpler, cheaper, and better tolerated by patients. An OGTT…

  • Oral fat load test

    Measurement of serum triglyceride levels (and other circulating fat molecules) after consumption of a specified amount of liquid fat or cream (e.g., 50 g).  

  • Orale

    The point on the hard palate where lines drawn tangent to the lingual margins of the alveoli of the medial incisor teeth intersect the midsagittal plane.  

  • Oral allergy syndrome

    A form of contact dermatitis of the bps, tongue, or other tissues of the mouth, usually triggered by exposure to fresh fruits or vegetables.  

  • Opt-out

    To choose not to participate in a program or not to receive information about a particular product or service. In health care, to decline to participate in a recommended program, e.g., in health screening, vaccination, or research.  

  • Optomyometer

    An instrument used for determining the strength of the muscles of the eye.  

  • Optokinetic

    Concerning the appearance of a twitching movement of the eyes, as in nystagmus when the eyes gaze at moving objects. A natural and automatic response, commonly referred to as a reflex, prompts the eyes of an individual to shift in tandem with the movement of their visual field. This remarkable mechanism ensures that the eyes…