Columbia Encyclopedia
Search results
51 results found
nicotine
(Encyclopedia)nicotine, C10H14N2, poisonous, pale yellow, oily liquid alkaloid with a pungent odor and an acrid taste. It turns brown on exposure to air. Nicotine, a naturally occurring constituent of tobacco, is t...Naipaul, V. S.
(Encyclopedia)Naipaul, V. S. (Sir Vidiadhar Surajprasad Naipaul) nīpôlˈ [key], 1932–2018, English writer, b. Chaguanas, Trinidad; grad. University College, Oxford, 1953. Naipul, whose family descended from Ind...fertility drug
(Encyclopedia)fertility drug, any of a variety of substances used to increase the possibility of conception and successful pregnancy. Different methods are used to correct or circumvent the many different functiona...cortisone
(Encyclopedia)cortisone kôrˈtĭsōnˌ [key], steroid hormone whose main physiological effect is on carbohydrate metabolism. It is synthesized from cholesterol in the outer layer, or cortex, of the adrenal gland u...menopause
(Encyclopedia)menopause klīmăkˈtərĭk, klīˌmăktĕrˈĭk [key], transitional phase in a woman's life when the ovaries stop releasing eggs, ovarian production of estrogen and other hormones tapers off, and men...designer drug
(Encyclopedia)designer drug, chemical substance synthesized in a laboratory that is intended to have effects similar to those of a drug that is a controlled substance, such as methamphetamine, marijuana, LSD, or an...finch
(Encyclopedia)finch, common name for members of the Fringillidae, the largest family of birds (including over half the known species), found in most parts of the world except Australia. The true finches are charact...AIDS, in medicine
(Encyclopedia)AIDS or acquired immunodeficiency syndrome, fatal disease caused by a rapidly mutating retrovirus that attacks the immune system and leaves the victim vulnerable to infections, malignancies, and neuro...psychopharmacology
(Encyclopedia)psychopharmacology sīˌkōfärˌməkŏlˈəjē [key], in its broadest sense, the study of all pharmacological agents that affect mental and emotional functions. The term is usually applied more speci...marijuana
(Encyclopedia)marijuana or marihuana, drug obtained from the flowering tops, stems, and leaves of the hemp plant, Cannabis sativa (see hemp) or C. indica; the latter species can withstand colder climates. It is one...Browse by Subject
- Earth and the Environment +-
- History +-
- Literature and the Arts +-
- Medicine +-
- People +-
- Philosophy and Religion +-
-
Places
+-
- Africa
- Asia
- Australia and Oceania
- Britain, Ireland, France, and the Low Countries
- Commonwealth of Independent States and the Baltic Nations
- Germany, Scandinavia, and Central Europe
- Latin America and the Caribbean
- Oceans, Continents, and Polar Regions
- Spain, Portugal, Italy, Greece, and the Balkans
- United States, Canada, and Greenland
- Plants and Animals +-
- Science and Technology +-
- Social Sciences and the Law +-
- Sports and Everyday Life +-
