Lexic.us

Definition of Alkaloid

1. Noun. Natural bases containing nitrogen found in plants.

Definition of Alkaloid

1. a. Pertaining to, resembling, or containing, alkali.

2. n. An organic base, especially one of a class of substances occurring ready formed in the tissues of plants and the bodies of animals.

Definition of Alkaloid

1. Noun. (organic chemistry) Any of many organic heterocyclic bases, that occur in nature and often have medicinal properties. ¹

¹ Source: wiktionary.com

Definition of Alkaloid

1. a type of chemical compound [n -S]

Medical Definition of Alkaloid

1. One of a large group of nitrogenous substances found in naturally in plants. They are usually very bitter and although the plant may be poisonous, many have extracts that are pharmacologically active. Examples are atropine, caffeine, coniine, morphine, nicotine, quinine, strychnine. The term is also applied to synthetic substances which have structures similar to plant alkaloids, such as procaine. (29 Sep 1997)

Lexicographical Neighbors of Alkaloid

Literary usage of Alkaloid

Below you will find example usage of this term as found in modern and/or classical literature:

1. Science by American Association for the Advancement of Science (1896)
"He had separated from them an alkaloid different from and more peculiar than any alkaloids known to chemists. The seeds contain one-third their weight of a ..."

2. American Druggist (1891)
"When molecular equivalents of the alkaloid and an inorganic acid are mixed ... If the water is insufficient to dissolve the alkaloid, this latter remains ..."

3. The Journal of Physiology by Physiological Society (Great Britain). (1879)
"At a later period of the year he extracted from bulbs which had done flowering an alkaloid which, in its general chemical characters, appeared to be ..."

4. A Dictionary of Applied Chemistry by Thomas Edward Thorpe (1921)
"The alcohol is lost at 130°-140°, and the alkaloid then melts at 205° with decomposition. Nearly insoluble in water, soluble in alcohol or ether. ..."

5. The American Journal of the Medical Sciences by Southern Society for Clinical Investigation (U.S.) (1864)
"Two drops of a watery solution of the alkaloid placed on the eye caused the pupil to contract after ... The alkaloid from one bean was given to a rabbit. ..."

6. Pharmaceutical Journal by Pharmaceutical Society of Great Britain (1854)
"Into this ethereal liquid, which contains the alkaloid in solution, one or two cubic centimetres of water acidulated with one-fifth its weight of pure ..."

7. The Optical Rotating Power of Organic Substances and Its Practical Applications by Hans Landolt, Otto Schönrock, Paul Lindner (1902)
"Alcohol (80 vol. pc ) ........ с 2, [«]J5 - -144.5°'' Absolute alcohol ....... с = 1.54 to 1.62 (calculated as alkaloid), ..."

8. Laboratory Manual for the Detection of Poisons and Powerful Drugs by Wilhelm Autenrieth (1921)
"After addition of sodium chloride ether takes up the alkaloid more readily. But vigorous shaking is always needed to cause complete transfer of alkaloid ..."

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