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Alkaloid   Listen
Alkaloid  n.  (Chem.) An organic base, especially one of a class of nitrogen-containing substances occurring ready formed in the tissues of plants and the bodies of animals. Note: Alkaloids all contain nitrogen, carbon, and hydrogen, and many of them also contain oxygen. They include many of the active principles in plants; thus, morphine and narcotine are alkaloids found in opium.

Collaborative International Dictionary of English 0.48

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"Alkaloid" Quotes from Famous Books

... in the valleys of the East Cordilleras of South America—i.e., in the interior of Peru and Bolivia. The fresh leaves contain 0.003 to 0.006 per cent of cocaine, which percentage decreases considerably if the leaves are stored any length of time before being worked up. On the other hand, the alkaloid can be transported and kept without decomposition. This circumstance caused the author to devise a simple process for the manufacture of crude cocaine on the spot, neither Peru nor Bolivia being suitable countries for complicated chemical operations. ...
— Scientific American Supplement, No. 623, December 10, 1887 • Various

... The isolation of the active principles of medicinal plants—such as morphine, quinine, strychnine, and cocaine—has been a remarkable service rendered by chemistry to medicine. How should we be handicapped if we still had to fight malarial disease with the crude Peruvian bark instead of its chief alkaloid, quinine! And how impracticable if not impossible would it be to render the eye insensitive to pain with any extract of coca leaves, no matter how concentrated—a purpose that we accomplish almost instantly with cocaine! Of minor importance, perhaps, but not to be ...
— Beacon Lights of History, Volume XIV • John Lord

... himself who once said that the Basque is the alkaloid of the Spaniard. The saying is true, so far as it goes. But it would be more accurate to say "one of the two alkaloids." It is probable that if the Spanish character were analyzed—always provided that the Mediterranean aspect of it be left aside ...
— Tragic Sense Of Life • Miguel de Unamuno

... fact that the most effective cure now practiced for such suppuration is to sterilize them by the actual cautery. Rosenbach says that he knows six distinct microbes which are capable of exciting suppuration in man. Their activity may be productive of a poison, or putrefactive alkaloid, ...
— Scientific American Supplement, No. 787, January 31, 1891 • Various

... the body appreciable traces of morphine—the principal alkaloid of opium—from which I infer that the deceased was a confirmed opium-smoker. This inference was supported by the general condition of the body, which was ill-nourished and emaciated and presented all the appearances usually met with in ...
— The Mystery of 31 New Inn • R. Austin Freeman

... (Dolophine, Methadose), and others (Darvon, Lomotil). Opium is the milky exudate of the incised, unripe seedpod of the opium poppy. Opium poppy (Papaver somniferum) is the source for many natural and semisynthetic narcotics. Poppy straw concentrate is the alkaloid derived from the mature dried opium poppy. Qat (kat, khat) is a stimulant from the buds or leaves of catha edulis that is chewed or drunk as tea. Quaaludes is the North American slang term for methaqualone, a pharmaceutical depressant. Stimulants are drugs that relieve mild depression, ...
— The 1995 CIA World Factbook • United States Central Intelligence Agency

... the Lady Dallona and Dr. Harnosh of Hosh had this telepathic-sensitive there, in a trance and drugged with a zerfa-derivative alkaloid the Lady Dallona had developed. I was Lord Garnon's Assassin; I discarnated him, myself. Why, I hadn't even put my pistol away before he was in control of this sensitive, in a room five stories above the banquet hall; he began communicating at once. We had ...
— Last Enemy • Henry Beam Piper

Words linked to "Alkaloid" :   scopolamine, curare, hyoscyamine, caffeine, atropine, organic compound, tubocurarine, Ergotrate Maleate, physostigmine, ergotamine, rauwolfia, ergonovine, hyoscine, pilocarpine, pseudoephedrine, strychnine, cinchonine, nicotine, brucine, alkaloidal

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