Columbia Encyclopedia

Search results

394 results found

ipecac

(Encyclopedia)ipecac ĭpˈĭkăk [key], drug obtained from the dried roots of a creeping shrub, Cephaelis (or Psychotria) ipecacuanha, native to Brazil but cultivated in other tropical climates. There are three var...

aloes

(Encyclopedia)aloes ălˈōz [key], drug obtained from the aloe; also a biblical name for an aromatic substance of various uses, mentioned in connection with myrrh and spices and thought to be the fragrant wood of ...

pharmacopoeia

(Encyclopedia)pharmacopoeia or pharmocopeia färˌməkəpēˈə [key], authoritative publication designating the properties, action, use, dosage, and standards of strength and purity of drugs. It is compiled under ...

HIV

(Encyclopedia)HIV, human immunodeficiency virus, either of two closely related retroviruses that invade T-helper lymphocytes and are responsible for AIDS. There are two types of HIV: HIV-1 and HIV-2. HIV-1 is respo...

macular degeneration

(Encyclopedia)macular degeneration, eye disorder causing loss of central vision. The affected area, the macula, lies at the back of the retina and is the part that produces the sharpest vision. The most serious vis...

Reno, Janet

(Encyclopedia)Reno, Janet rēˈnō [key], 1938–2016, U.S. attorney general (1993–2001), b. Miami, Fla.; grad. Harvard Law School (1963). As assistant state's attorney (1973–76) and state's attorney (1976–93...

chickenpox

(Encyclopedia)chickenpox or varicella vârˌəsĕlˈə [key], infectious disease usually occurring in childhood. It is caused by the same herpesvirus, varicella-zoster, that produces shingles; the virus can hide in...

Childress, Alice

(Encyclopedia)Childress, Alice, 1920–94, American playwright and novelist, b. Charleston, S.C. She moved (1925) to New York City and was raised in Harlem. Childress joined the American Negro Theatre in 1941, and ...

baldness

(Encyclopedia)baldness, 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 b...

patent medicine

(Encyclopedia)patent medicine, packaged drugs that can be obtained without prescription; the term was formerly used to describe quack remedies sold by peddlers. Patent, or proprietary, medicines are advertised to t...