Beard: The hair that normally grows on the male face after puberty. Testosterone, the most potent of the naturally occurring androgens, causes the development of secondary sex features such as the beard that are characteristic of the adult male.
Although there is normally hair on everyone’s face, the growth of a real beard on the face of a young child or a woman is not. It is a form of hirsutism (hairiness) and can sometimes reflect an underlying disorder.
The term “beard” may exclude the mustache.
- Beard ringworm
Beard ringworm: A superficial fungal infection of the skin, affecting the bearded area of the face and neck, with swellings and marked crusting, often with itching, sometimes causing the hair to break off. In the days when men went to the barber daily for a shave, this affliction was called barber’s itch. Also known as […]
- Beau's lines
Beau’s lines: Transverse lines or grooves across the fingernails, or transverse depressions in the nail plate, from temporary disturbance of cell division where the nail develops. The condition may be caused by local disease or injury of the nail fold, or from a generalized condition such as an illness or a drug, for example, chemotherapy.
- Beaufort wind scale
Beaufort wind scale: A widely used wind force scale which is a simple numerical relationship to wind speed based on an observation of the effects of the wind. The Beaufort wind scale is of importance in preparations for a tropical storm or hurricane.
- Becker muscular dystrophy
Becker muscular dystrophy: A chronic, progressive muscle degeneration disease. A form of muscular dystrophy that is quite similar to Duchenne muscular dystrophy, except that patients with Becker do produce some of the key protein, dystrophin, whereas those with Duchenne do not. Progression of the disease in Becker type is slower than in Duchenne, and symptoms […]
- Beckwith-Wiedemann syndrome
Beckwith-Wiedemann syndrome: An overgrowth syndrome, whose clinical manifestations typically include macrosomia (large body size), macroglossia (large tongue), omphalocele (exomphalos), organomegaly (enlarged organs), hemihypertrophy (overgrowth of one side of the body), neonatal hypoglycemia (low blood sugar in the newborn period), and ear creases and ear pits. Patients with this syndrome have an increased risk of embryonal […]