Columbia Encyclopedia
Search results
23 results found
methionine
(Encyclopedia)CE5 methionine mĕthīˈənēn [key], organic compound, one of the 20 amino acids commonly found in animal proteins. Only the L-stereoisomer appears in mammalian protein. It is one of the several e...antidepressant
(Encyclopedia)antidepressant, any of a wide range of drugs used to treat psychic depression. They are given to elevate mood, counter suicidal thoughts, and increase the effectiveness of psychotherapy. Before the in...ephedrine
(Encyclopedia)ephedrine ĭfĕdˈrĭn, ĕfˈĭdrēnˌ [key], drug derived from plants of the genus Ephedra (see Pinophyta), most commonly used to prevent mild or moderate attacks of bronchial asthma. Unlike epinephr...tyrosine
(Encyclopedia)CE5 tyrosine tīˈrəsēn [key], organic compound, one of the 20 amino acids commonly found in animal proteins. Only the l-stereoisomer appears in mammalian protein. It is not essential to the huma...meatpacking
(Encyclopedia)meatpacking or meat-processing, wholesale business of buying and slaughtering animals and then processing and distributing their carcasses to retailers. The livestock industry is among the largest in ...adrenal gland
(Encyclopedia)CE5 Adrenal glands: The cross-sectioned area shows the adrenal cortex and medulla. adrenal gland so͞oprərēnˈəl [key], endocrine gland (see endocrine system) about 2 in. (5.1 cm) long situated...hypersensitivity
(Encyclopedia)hypersensitivity, heightened response in a body tissue to an antigen or foreign substance. The body normally responds to an antigen by producing specific antibodies against it. The antibodies impart i...stimulant
(Encyclopedia)stimulant, any substance that causes an increase in activity in various parts of the nervous system or directly increases muscle activity. Cerebral, or psychic, stimulants act on the central nervous s...amphetamine
(Encyclopedia)amphetamine ămfĕtˈəmēn [key], any one of a group of drugs that are powerful central nervous system stimulants. Amphetamines have stimulating effects opposite to the effects of depressants such as...hallucinogenic drug
(Encyclopedia)hallucinogenic drug həlo͞oˌsənōjĕnˈĭk [key], any of a group of substances that alter consciousness; also called psychotomimetic (i.e., mimicking psychosis), mind-expanding, or psychedelic drug...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 +-
