Category: N

Disorder, occurring only in males, characterized by short stature, lowset ears, and often decreased fertility.  

Incapable of life or living. Often used in reference to a fetus that has died in utero or to tissues that have been damaged, such as in a bum injury. Incapable of life or of living. This term is frequently used to indicate a fetus that has either died in utero or been born prior…

Inflammation of the urethra not known to be caused by a specific organism. There are often no symptoms in women; in men, urethral discharge. NSU is most likely sexually transmitted.  

Period of sleep representing about 75% of normal sleep time during which dreaming and rapid eye muscle contractions do not occur. NREM sleep periods alternate with short REM (dreaming) sleep periods during normal sleep. Most NREM sleep occurs in four stages: stage 1, characterized by theta rhythm; stage 2, characterized by distinctive sleep patterns; stages…

Nervous system structures not encased by myelin; may be normal, as in parts of the brain and spinal cord, or abnormal. Loss of myelin occurs in several disease states, including multiple sclerosis; these are referred to as demyehnating diseases. Molecules that lack an affinity for water (hydrophobic) because of the absence of opposite charges (poles)…

In medicine, pert, to a diagnostic or therapeutic technique that does not involve puncturing the skin or entering the body cavity or an organ. A term describing a medical procedure that does not involve penetration of the skin or entry into the body through one of the natural openings. A diagnostic or therapeutic procedure or…

Perception by nerves of injury or pain. The stimulus-response process involving the stimulation of peripheral pain-carrying nerve fibers (e.g., C-fibers, A-delta fibers) and the transmission of impulses along peripheral nerves to the central nervous system, where the stimulus is perceived as pain. The process by which the nervous system detects and transmit injury-related information. It…

Oral histamine blocker used in the treatment of peptic ulcer disease. An antiulcer drug. Nizatidine (Axid) is a histamine2 (H2)-receptor antagonist, or H 2-blocker, used to treat duodenal ulcers and prevent their return. It is also used for certain conditions in which the stomach produces too much acid.  

Coronary vasodilator used in the treatment of angina pectoris. Adverse effects include headache, flushing, and low blood pressure. Concomitant administration with Viagra may be fatal. A fast-acting vasodilator drug. An antiangina drug. Nitroglycerin (Deponit, Nitro-Dur, Nitrolingual, Nitrostat, Minitran, and others) is used to treat the symptoms of angina (chest pain). Nitroglycerin is used in four…

Rubber or plastic device to protect the nipples of nursing women, especially cracked or sore nipples, and to allow them to heal. Gas normally produced in the body and present in expired air; in blood vessels, it plays a major role in vasodilation. Administration of the drug nitroglycerine increases the nitric oxide level; this leads…