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  1. Alkaloid - Wikipedia

    [1] Alkaloids are a broad class of naturally occurring organic compounds that contain at least one nitrogen atom. Some synthetic compounds of similar structure may also be termed alkaloids. [2] …

  2. Alkaloid | Definition, Structure, & Classification | Britannica

    Dec 24, 2025 · Alkaloid, any of a class of naturally occurring organic nitrogen-containing bases. Alkaloids have diverse and important physiological effects on humans and other animals. Well …

  3. Alkaloids | Springer Nature Link (formerly SpringerLink)

    May 15, 2025 · This chapter addresses the complex field of alkaloids, their definition and classification, as well as their significance in nature and industry. Despite nearly 50 years of discussion, a uniform …

  4. What Is an Alkaloid? Definition, Sources, and Examples

    Alkaloids are naturally occurring compounds with unique properties. These organic molecules are primarily found in plants, but also appear in some fungi and animals. Alkaloids exhibit diverse effects …

  5. What Is an Alkaloid? Chemical Structure and Function

    Alkaloids are naturally occurring organic compounds characterized by the presence of nitrogen atoms. They are predominantly synthesized by plants, but are also found in some fungi, bacteria, and animals.

  6. ALKALOID Definition & Meaning - Merriam-Webster

    The meaning of ALKALOID is any of numerous usually colorless, complex, and bitter organic bases (such as morphine or caffeine) containing nitrogen and usually oxygen that occur especially in seed …

  7. Alkaloid - an overview | ScienceDirect Topics

    Alkaloids are a group of naturally occurring chemical constituents that can be generated by bacteria, fungi, plants, animals and isolated from crude extracts of these organisms.

  8. Alkaloid - New World Encyclopedia

    Alkaloids are usually derivatives of amino acids, and many have a bitter taste. They are found as secondary metabolites in plants (such as potatoes and tomatoes), animals (such as shellfish), and …

  9. Alkaloid: Definition, Types & Importance - Vedantu

    Learn what alkaloids are, their types, and their role in plants and medicine. Easy guide for students wanting clear answers.

  10. ALKALOID Definition & Meaning | Dictionary.com

    ALKALOID definition: any of a large class of organic, nitrogen-containing ring compounds of vegetable origin and sometimes synthesized, some of which are liquid but most of which are solid, that have a …