Medical Dictionary Definitions A-Z List
Medical Dictionary Definitions A - Z - «P»:
Preclinical study: A study to test a drug, procedure or other medical
treatment in animals. The aim is to collect data in support of safety. Preclinical studies
are required before clinical trials can be started....
Precocious: Unusually early development, whether it be of intellectual powers, speech, physical traits, etc. Precocious puberty is the unusually early development of secondary sexual features. The onset of sexual maturation in a girl before age 8 or a boy before age 9 is usually considered to be pr...
Precocious puberty: Precocious puberty is the unusually early development of secondary sexual features. The onset of sexual maturation in a girl before age 8 or a boy before age 9 is usually considered to be precocious puberty....
Preconceptual counselling: The interchange of
information prior to pregnancy. Usually for pregnancy planning and
care, but sometimes in the form of genetic counseling. See also
Precursor: Forerunner. That which precedes or is derived from an available source.
The term "precursor" is applied to an inactive substance converted to an active one (such as an enzyme, vitamin, or hormone). The term "precursor" applies to any chemical that is transformed into another.
From the L...
Predispose: To make more likely or render susceptible. Smoking predisposes to a number of diseases, including esophageal cancer....
Preeclampsia: A condition in pregnancy characterized by abrupt hypertension (a sharp rise in blood pressure), albuminuria (leakage of large amounts of the protein albumin into the urine) and edema (swelling) of the hands, feet, and face. Preeclampsia is the most common complication of pregnancy. It ...
Preemie: Short slang for a premature baby. A preterm infant. Also spelled premie. ...
Preexcitation: In cardiology, the premature activation of part of the ventricle due to transmission of impulses along an accessory pathway that is not subject to the normal delay at the atrioventricular node.
Preexcitation is sometimes used as a synonym for the Wolff-Parkinson-White syndrome but pr...
Prefix, medical: See: Medical prefix....
Prefixes, medical: Medical words are often put
together, cobbled from two or
more building blocks. Among these building blocks are the
Examples of prefixes used in medicine include:
a- : Prefix much employed in the health sciences
indicating "not, without,
-less" as, for example, in a...
Pregnancy: The state of carrying a developing
embryo or fetus within the female body. This condition can
be indicated by positive results on an over-the-counter
urine test, and confirmed through a blood test, ultrasound,
detection of fetal heartbeat, or an X-ray. Pregnancy lasts
for about nine ...
Pregnancy abuse: Abuse of an expectant mother. This abuse is most often perpetrated by the woman's spouse, partner, or relative. Spurts of temper can progress to shouting and name calling. Then pushing and shoving. The use of physical violence can start a pattern. It is estimated that 1 in 12 pregna...
Pregnancy calendar: A pregnancy calendar is a chronological depiction of changes in a pregnant woman and the
embryo/fetus during the 40-week course of pregnancy. Pregnancy calendars usually
describe development and growth of the fetus and changes in the mother's body at weekly intervals. The calen...
Pregnancy danger from fifth disease
Pregnancy danger from fifth disease: Caused by a virus
known as parvovirus B 19. Symptoms include low-grade fever, fatigue, a "slapped
cheeks rash," and a rash over the whole body. The illness is not serious in children.
Pregnant women (who have not previously had the illness) should avoid...