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alkaloid 中文解釋 wordnet sense Collocation Usage Collins Definition
Noun
/ˈalkəˌloid/,
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alkaloids, plural;
  1. Any of a class of nitrogenous organic compounds of plant origin that have pronounced physiological actions on humans. They include many drugs (morphine, quinine) and poisons (atropine, strychnine)

  1. natural bases containing nitrogen found in plants
  2. (alkaloidal) pertaining to or consisting of alkaloids
  3. Alkaloids are a group of naturally occurring chemical compounds which mostly contain basic nitrogen atoms. This group also includes some related compounds with neutral, 2nd ed. (The "Gold Book"). Compiled by A. D. McNaught and A. Wilkinson. ...
  4. Alkaloid (Алкалоид) is one of the largest companies in the Republic of Macedonia manufacturing drugs, processing botanical raw material, manufacturing cosmetics and chemical products.
  5. Any of many organic heterocyclic bases, that occur in nature and often have medicinal properties
  6. (Alkaloids) (noun) Any of various organic compounds, normally with bases and usually containing at least one nitrogen atom in a heterocyclic ring, occurring chiefly in many vascular plants and some fungi. ...
  7. (Alkaloids) a heterogeneous group of chemicals with nitrogenous bases which occur naturally in plants. Many produce a strong physiological reaction when introduced into animals.
  8. (Alkaloids) are one of the sixteen possible types of active constituents found in herbs and plants. They are very powerful active constituents and very reactive, with also a very high biological activity.
  9. (Alkaloids) basic organic substances, usually vegetable in origin and having an alkaline reaction. Like alkalis they combine with acids to form salts. Some are toxic, insoluble in water.
  10. (alkaloids) Organic compounds produced by plants. These substances constitute the active ingredients of many drugs.
  11. A member of a large group of chemicals that are made by plants and have nitrogen in them. Some alkaloids have been shown to work against cancer.
  12. organic substances occurring naturally, which are basic, forming salts with acids. The basic group is usually an amino function.
  13. A naturally occuring organic compound containing nitrogen that acts as a base. Many alkaloids are physiologically active and can be used in small quantities as medicines, but if taken in larger doses they can be extremely poisonous. An example is caffeine.
  14. Small but chemically complex nitrogen-containing metabolite produced by plants as a defense against herbivores. Examples include caffeine, morphine, and colchicine.
  15. A nitrogen-containing compound frequently used as a chemical defense by plants.
  16. A large, varied group of complex nitrogen-containing compounds, usually alkaline, that react with acids to form soluble salts, many of which have physiological effects on humans. Includes nicotine, cocaine, caffeine, etc.
  17. Any in a class of naturally occurring organic bases containing nitrogen. Popular Alkaloids include Nicotine, Morphine, Ephedrine, and Quinine. ...
  18. A class of nitrogenous organic molecule that has a pharmacological effect on humans and other animals. Many are highly poisonous, some have cruative properties. ...
  19. the active element of a drug in its natural state.
  20. Any of a class of organic compounds composed of carbon, hydrogen, nitrogen, and usually oxygen, that are often derived from plants. The name means alkalilike, but some alkaloids do not exhibit alkaline properties. ...
  21. probably the most important chemicals found in plants, as they usually have a medical action. They are organic substances, found in association with organic acids in most plant groups, particularly the flowering plants. ...
  22. Chemicals that are found naturally in plants with medicinal properties.
  23. A bitter-tasting organic ring compound that contains at least one Nitrogen, known to have either medicinal and/or poisonous effect on humans, found most often in plants and some fungi
  24. Any organic agent isolated from plants that contains nitrogen and reacts with an acid to form a salt.
  25. heterogeneous group of alkaline, organic, compounds containing nitrogen and usually oxygen; usually colorless and bitter-tasting; especially found in seed plants.