Use the alphabetical index to look up a term.
ULCER - sore of lesion of the skin or membrane of an organ caused by infection or disease
URO, URONO - when used as a part of a word, refers to urine, the urinary tract, or urination
UTER, UTERO - when used as a part of a word, refers to the uterus
VACCINE - substance made from a weakened or dead virus or bacteria, which is administered orally or by injection to trigger the body's immune defense. Polio and smallpox are two diseases that are nearly extinct in the U.S. because most of the population have taken vaccines to protect them against these diseases
VALVE - structures, usually a flap of tissue, found in the heart, veins, lymph vessels, and other passages that ensure fluid contents, like blood, flow in only one direction
VIRUS - a micro-organism that must attach itself to a living cell to complete itself and be able to reproduce. Some viruses are disease-producing and causes illnesses such as measles, chickenpox, some types of pneumonia, and the common cold.
WHEEZE - a high-pitched sound that indicates a narrowed airway. Usually caused by chronic respiratory disease such as asthma but can also be caused by a foreign object in the airway.
WITHDRAWAL SYMPTOMS - physical changes that result when addictive substances such as nicotine, alcohol, or narcotics are removed. Withdrawal symptoms are sometimes life-threatening.
X CHROMOSOME - determines gender; females have two X chromosomes and males have one X and one Y chromosome
XENO - when used as a part of a word, means strange or foreign
XER, XERO - when used as part of a word, means dryness, e.g., xerocheilia, dry lips
Y CHROMOSOME - part of the genetic code that is found only in males
ZOO - when used as a part of a word, refers to animals, e.g., zoonosis, a disease such as rabies that is transmitted by animals to humans
ZYGOMATIC - the cheekbones
ZYGOTE - a fertilized eggdictionary or medical encyclopedia.
Medical Library Association
Last Updated: 2007 May 23