Bicycle helmet
Bicycle helmet: A well-known but often neglected device designed to protect the head of a bicyclist.
Helmets decrease the risk of head injuries (traumatic brain damage) by about 85%. However, only about 18% of bicyclists in the US use helmets all or most of the time. Universal helmet use could prevent an average of 500 bicycle-related deaths each year in the US alone.
Read Also:
- bid (on prescription)
bid (on prescription): Seen on a prescription, bid means twice (two times) a day. It is an abbreviation for “bis in die” which in Latin means twice a day. The abbreviation bid is sometimes written without a period either in lower-case letters as “bid” or in capital letters as “BID” or with periods as “b.i.d.” […]
- Biermer's anemia
Biermer’s anemia: A blood disorder caused by a lack of vitamin B12. Patients who have this disorder do not produce the substance in the stomach that allows the body to absorb vitamin B12. This substance is called intrinsic factor (IF). Biermer’s anemia, better known as pernicious anemia (PA), is characterized by the presence in the […]
- Bietti crystalline dystrophy
Bietti crystalline dystrophy: A genetic eye disease that leads to progressive night blindness and visual field constriction and is characterized by the formation of crystals in the cornea (the clear covering of the eye), yellow shiny deposits on the retina, and progressive atrophy of the retina and choroid (the back layers of the eye). Average […]
- Bifid uvula
Bifid uvula: The anatomic structure that dangles downward at the back of the mouth and is attached to the rear of the soft palate.
- Big toe sign
Big toe sign: An important neurologic examination based upon what the big toe (and other toes) do when the sole of the foot is stimulated. If the big toe goes up, that may mean trouble. The big toe response, also called the Babinski reflex, is obtained by stimulating the external portion (the outside) of the […]