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  • narcolepsy

    A medical disorder. Symptoms include extreme tendency to fall asleep in quiet surroundings or when engaged in repetitive activities. The patient can be woken easily and is immediately alert.

  • narcotic

    A term used to describe any drug that can dull the senses or cause numbness. In the USA the term is applied to all drugs that are classified as illegal.

  • nasal dropper

    A small container used to pour medicated oils into the nose. Allows the liquid to be applied drop by drop.

  • naturopathy

    A complementary practice that only uses natural products for drugs as well as diet, massage and exercise.

  • nausea

    A feeling of sickness felt in the stomach and often leading to vomiting. Nausea is particularly associated with seasickness and motion sickness.

  • necklace

    Ornaments worn around the neck, usually in the form of chains or strands of beads, pearls, stones, or the like, and often including a suspended ornamental pendant. Use "chokers" for short, narrow necklaces worn close to the throat. Use "dog collars (necklaces)" for wide ornamental bands worn tightly around the neck.

  • nervous diseases

    Diseases of the central nervous system, including the brain and spinal cord. These include Creutzfeldt-Jakob Syndrome (CJD), Parkinson’s disease and meningitis.

  • netsuke

    Small ornamental object carved in wood or ivory. Netsuke were used as toggles (buttons) for Japanese kimonos or pouches in the 1600s.

  • neuralgia

    Spasms of pain which extend along one or more nerves.

  • neurology

    The study of the functions, anatomy and organic disorders of the nervous system.

  • neurosurgery

    A surgical speciality that treats diseases and disorders of the brain, spinal cord, and nervous system.

  • newspaper cutting

    Illustrations, pages, articles, or columns of text removed from books, newspapers, journals, or other printed sources.

  • nicotine

    A chemical compound that forms 0.6-3.0 per cent of the dry weight of tobacco. Nicotine acts as a stimulant in mammals, and is one of the primary reasons for smoking addiction.

  • night light

    Small lamps intended for use in the bedroom or sickroom. Originally glass float lamps; also includes miniature, especially glass, oil and kerosene lamps of the late 19th and early 20th centuries.

  • nipple shield

    A plastic or glass cap or dome used by breastfeeding mothers to help babies to latch onto the breast and/or to protect sore or cracked nipples.

  • nitrous oxide

    Nitrogen oxide. A colourless, odourless gas that is used as an anaesthetic and analgesic. High concentrations cause a narcotic effect and may replace oxygen, causing death by asphyxia. It is also used as a food aerosol in the preparation of whipping cream.

  • NMR

    Nuclear magnetic resonance is a technique used to detect what chemicals make up a sample containing unknown materials, or proportions of material. The sample is exposed to radio waves, and the frequency of electromagnetic energy that the sample absorbs is recorded. Because different atoms absorb unique frequencies of radiation, it is possible to determine what sort of atoms are present in the sample. NMR is now known as Magnetic Resonance Imaging (MRI).

  • Nobel Prize

    Awarded annually for outstanding work in physics, chemistry, physiology or medicine, literature, economics, and the promotion of peace.

  • non-invasive

    A technique that does not require the use of instruments inside the body.

  • Nooth's apparatus

    device to mix carbon dioxide and water for medicinal uses

  • nose

    The prominent part of the face or anterior extremity of the head that lies above the mouth containing the nostrils and olfactory cavities; the olfactory organ.

  • nose spectacles - pince nez

    Type of spectacles supported by the nose, used to compensate for defective vision. Similar to bow spectacles,they are characterised by a C-shaped metal spring bridge, often fitted with pads, that clips onto the nose. Pinch-nez (nose-pinching from the French) first appeared in the late 19th century and were popular for the next 40 years.

  • nursing

    The study and practice of caring for and waiting on the sick, injured, or others unable to look after themselves or to deal with their specific medical needs.

  • nursing kit

    Group of objects collectively used by nurses working outside of a hospital.

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