Medical Dictionary Definitions A-Z List
Medical Dictionary Definitions A - Z - «B»:
Baby blues: A common temporary psychological state right after childbirth when a new mother may have sudden mood swings, feeling very happy, then very sad, cry for no apparent reason, feel impatient, unusually irritable, restless, anxious, lonely and sad. The baby blues may last only a few hours or ...
Baby teeth: See: Primary teeth....
Baby walker: A device that allows a baby to move about in a half-seated, half-upright position.
A "walker" may paradoxically delay a baby in development. The baby using a walker tends to be slow in reaching motor milestones such as sitting up, crawling, and walking and other milestones such as those...
Baby, fetal alcohol syndrome
Baby, fetal alcohol syndrome: See: Fetal alcohol syndrome....
Babysitter's elbow: See: Nursemaid's elbow....
BAC: Abbreviation for bacterial artificial chromosome. An artificially created chromosome in which medium-sized segments of foreign DNA (pieces of DNA 100,000 to 300,000 bases in length from another species) are cloned into bacteria. Once the foreign DNA has
been cloned into the bacteria's chromoso...
Bacillary angiomatosis: A bacterial
infection due to a cat scratch most often seen today in people with HIV. The disease characteristically presents with swollen lymph nodes (lymphadenitis), sore throat,
fatigue, and fever, chills, sweats, vomiting, loss of appetite, and weight loss. There is usu...
Bacille Calmette Guerin
Bacille Calmette Guérin: An effective immunization against tuberculosis. Commonly abbreviated BCG, it is an attenuated (weakened) version of a bacterium called Mycobacterium bovis which is closely related to Mycobacterium tuberculosis, the agent responsible for tuberculosis.
Bacillophobia: An abnormal and persistent fear of bacilli
(bacteria). A phobia is an unreasonable sort of fear that can cause
avoidance and panic. Phobias are a relatively common type of anxiety
disorder. Phobias can be treated with cognitive behavioral therapy
using exposure and fear reduction ...
Bacillus: A large family of bacteria that have a
rod-like shape. They include the bacteria that cause food
to spoil, and also those responsible for some types of
diseases. Helpful members of the bacillus family are used
to make antibiotics, or colonize the human intestinal tract
and aid with di...
Bacillus anthracis: The bacterium that causes anthrax. Anthrax differs from most bacteria in that they exist in an inactive (dormant) state called spores. The spores are found in soil, animal carcasses and feces (including sheep, goats, cattle, bison, horses, and deer), and animal products (e.g., hi...
Back pain: Pain felt in the low or upper back. There are many causes of back pain.
Pain in the low back can relate to the bony lumbar spine, discs between the vertebrae, ligaments around the spine and discs, spinal cord and nerves, muscles of the low back, internal organs of the pelvis and abdomen,...
Back pain, low
Back pain, low: Pain in the lower back area that can relate to problems with the lumbar spine, the discs between the vertebrae, the ligaments around the spine and discs, the spinal cord and nerves, muscles of the low back, internal organs of the pelvis and abdomen, or the skin covering the lumbar ...
Backbone: The spine. A flexible row of bones
stretching from the base of the skull to the tailbone....
Background radiation: Radiation that comes from environmental sources including the earth's crust, the atmosphere, cosmic rays, and radioisotopes. Natural sources of radiation account for the largest amount of radiation exposure received by most people each year with medical and occupational source...