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  • rabies

    Rabies is a disease which infects domestic and wild animals. It is a virus transmitted to other animals and humans through close contact with saliva from those infected (i.e. bites, scratches, licks on broken skin). Once symptoms of the disease develop, rabies is fatal.

  • radiation

    Transmission of any type of energy by means of rays, waves or as mobile sub-atomic particles (electrons, neutrons and protons).

  • radiation therapy

    A type of medical treatment that uses high energy radiation such as X-rays.

  • radio signals

    A code or message delivered via a radio or interpreter most often in the form of sound.

  • radiology

    The scientific study of X-rays and other high energy radiation, especially as used in medicine.

  • razor

    Sharp-edged instruments primarily used in the shaving of bodily hair. Razors can be manually or electrically powered, and the earliest bronze razor blade dates back to the Bronze Age.

  • record - document

    Recorded information, regardless of medium, created, received, and maintained by an agency, institution, organization, or individual in pursuance of its legal obligations or in the transaction of business.

  • rectal speculum

    Instrument used to dilate the anus or rectum, and throwing light within, thus facilitating examination or surgical operations.

  • rectum

    The last portion of the large intestine that communicates with the colon above and the anus below.

  • reflexology

    A complementary practice based on the theory that reflex points in the feet are connected to the rest of the human body. Massage of these points is believed to unblock energy flows in the body that cause illness.

  • refractor head

    Instrument providing means of positioning lenses, prisms and other optical devices in front of a subject's eyes for the purpose of determining refractive error and binocular functions

  • regulatory sign

    Sign that is intended to regulate behavior, displaying such information as prohibitions or rules of order or conduct.

  • rehabilitative therapy

    Therapy to improve a person's condition after illness or injury, prevent further loss of function, and maintain or improve quality of life.

  • relief

    Use for images, especially pictorial compositions, executed in relief - a surface that has been carved, molded, or stamped so that an image or design projects from or is sunk into a continuous surface.

  • replica

    Use for precise reproductions of valued objects, usually in the same dimensions as the original. For reproductions of an image alone, use "reproductions" or "facsimiles." Use also when more than one similar object is produced by the same artist, craftsman, or studio, with little or no variation between them; if variation is apparent, use "versions." Distinct from "forgeries" and "counterfeits," which are produced with the intent to deceive.

  • reproduction

    Copies of art images, art objects, or other valued images or objects, made without intent to deceive; with regard to art images, includes photographic reproductions; implies more precise and faithful imitation than does the term "copies (derivative objects)." Where the intent is to deceive, see "forgeries" or "counterfeits."

  • respirator

    A device worn over the face to prevent the breathing in of poisonous substances.

  • resuscitation

    The act of restoring life to someone near death. This is done by such measures as artificial respiration (kiss-of-life) and cardiac massage.

  • resuscitator

    A device or instrument used for resuscitation after asphyxia or the cessation of breathing.

  • retinal detachment

    disorder of the eye in which the retina peels away from its underlying layer of support tissue. Initial detachment may be localized, but without rapid treatment the entire retina may detach, leading to vision loss and blindness.

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