Webster's New World Medical Dictionary

renal vein thrombosis
A blood clot in the
major vein that drains blood from the kidney.
Rendu-Osler-Weber syndrome
See 
hereditary
hemorrhagic telangiectasia.
rep 1
Slang for a pharmaceutical company repre-
sentative.
2
Roentgen equivalent physical, a unit of
absorbed radiation approximately equivalent to one
roentgen.
repair, DNA
See 
DNA repair.
reperfusion
The restoration of blood flow to an
organ or to tissue. After a heart attack, an immedi-
ate goal is to quickly open blocked arteries and
reperfuse the heart muscles. Early reperfusion min-
imizes the extent of heart muscle damage and pre-
serves the pumping function of the heart.
repetitive stress injury
An injury that occurs
due to recurrent overuse or improper use. One of
the best-known repetitive stress injuries is carpal
tunnel syndrome, which often results from the
trauma of highly repetitive work such as that of
supermarket checkers, assembly-line workers, typ-
ists, word processors, accountants, and writers.
replacement therapy, estrogen
See 
estrogen
replacement therapy.
replacement therapy, hormone
See 
hormone
therapy.
replication
A turning back, repetition, duplica-
tion, or reproduction. See also 
DNA replication.
replication, DNA
See 
DNA replication.
reportable disease
A disease that must be
reported to federal, state, or local health officials
when diagnosed.
reproduction
The production of offspring.
Reproduction need not be sexual; for example,
yeast can reproduce by budding.
reproductive cell
An egg or a sperm cell. Each
mature reproductive cell is haploid, meaning that it
has a single set of 23 chromosomes and so contains
half the usual amount of DNA.