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thinning or loss of hair as a result of illness, functional disorder, or hereditary disposition; also known as alopecia. Male pattern baldness, a genetic trait, is the most common cause of baldness among white males. It is carried by females, but they are rarely susceptible inasmuch as it develops under the influence of testosterone, a male sex hormone; women, however, may experience an overall thinning of the hair. Hair loss begins at the forehead and crown and is slowly progressive. Male pattern baldness may be cosmetically disguised by hair-follicle transplants. Drug treatments with minoxidil (Rogaine) or finasteride (Propecia) have been used with limited effectiveness.

Diseases characterized by high fever (e.g., scarlet and typhoid fevers), malnutrition, chemotherapy, and glandular disorders can all cause balding. Treatment of the disease or dysfunction will usually halt the loss of hair, and if the scalp and hair follicles are not severely damaged, hair will usually regrow spontaneously. Scalp infection, oiliness or dirtiness of the scalp and hair, and excessive teasing and lacquering of hair are also conducive to baldness. Alopecia areata is a disease of unknown origin characterized by noninflamed bald patches in the scalp hair and beard. It is recurrent but is usually of short duration.


Loss or absence of hair.


mistaking his bald head for a rock, an eagle dropped a tortoise on it, thus killing him. [Gk. Legend: Brewer Dictionary, 13]
(the Frog) name given infant by wolves for hairlessness. [Children’s Lit.: The Jungle Book]
bald eagle
U.S. national bird whose white head looks bald. [Am. Hist.: EB, I: 753]
References in periodicals archive ?
As well as the studio in the Jewellery Quarter, Hairloss Improvement Studio's cosmetic hair loss and other treatments are also available at a number of UK Saks Hair and Beauty salons across the region including those in Birmingham, Sutton Coldfield and Bromsgrove.
The loss of a breast can be hidden; however, it is harder to hide hairloss.
Wendy, who laughed about her collection of three blonde wigs she wore to hide her hairloss following treatment, also told how she was unable to eat solids and was left 'knocked for six' by her regular bouts of chemo.
The Scot will spill the beans on her divorce from ex-Toploader guitarist Dan Hipgrave as well as her battle to deal with hairloss condition alopecia.
Hairloss (particularly of the eyebrows), dry skin and hoarseness are also common.
We know it is very difficult to do, but this is the holy grail that we all have in mind - to make something to put on the heads of people with hairloss problems.
Its main ingredient tackles a massive problem for many men - hairloss.
A hitman called Maguire is hired to rub them out which is where Jude Law comes in, with scabby teeth and tragic hairloss (girls, cover your eyes now