Dictionary

necrosis The death of living cells or tissues. Necrosis can be due, for example, to lack of blood flow (ischemia). From the Greek nekros, meaning “dead body.”

necropsy See autopsy.

neck, stiff See torticollis.

Necator americanus The American hookworm, the cause of hookworm disease in people. See also hookworm.

nebulizer A device for administering a medication by spraying a fine mist. Also known as atomizer.

nebulization, heated Administration of medication via fine spray that has been heated to increase its water content.

nebulization The conversion of a medication into an aerosol or a spray to deliver the medication, for example, to the lungs.

nearsightedness See myopia.

ND Naturopathic doctor. See naturopath.

NCI National Cancer Institute. See National Institutes of Health.

navel See bellybutton.

nausea Stomach queasiness, the urge to vomit. Nausea can be brought on by many causes, including systemic illnesses (such as influenza), medications, pain, and inner ear disease.