A definition is a statement of the meaning of a term (a word, phrase, or other set of symbols).[a] The term to be defined is the definiendum. The term may have many different senses and multiple meanings. For each meaning, a definiens is a cluster of words that defines that term (and clarifies the speaker's intention).
A definition will vary in aspects like precision or popularity. There are also different types of definitions with different purposes and focuses (e.g. intensional, extensional, descriptive, stipulative, and so on).
A chief difficulty in the management of definitions is the necessity of using other terms that are already understood or whose definitions are easily obtainable or demonstrable (e.g. a need, sometimes, for ostensive definitions). Quelle: Wikipedia
Anandamide (or arachidonyl-ethanolamide) is an endocannabinoid or endogenous ligand to the cannabinoid receptor. It was the first to be discovered, in 1992.
CBD, or cannabidiol, is the major non-psychotropic cannabinoid found in Cannabis. It has shown anti-epileptic, anti-inflammatory, anti-emetic, muscle relaxing, anxiolytic, neuroprotective and anti-psychotic activity and reduces the psychoactive effects of THC. The mode of action of cannabidiol is not fully understood and several mechanisms have been proposed, including an antagonistic action at the CB1 receptor.
The term "cannabinoid" has different meanings. In a more narrow sense, it designates the natural cannabinoids of the cannabis plant. In the broadest sense, it includes all chemicals that bind to the cannabinoid receptors and related compounds. The endogenous ligands of the cannabinoid receptors have been termed endocannabinoids.
Several cells in the brain and other organs contain specific protein receptors that recognize THC and some other cannabinoids and trigger cell responses. Other cannabinoids do not bind to these cannabinoid receptors and exert their effects by other ways. The discovery of specific cannabinoid receptors prompted the search for putative naturally-occurring chemicals that interact with the receptors, the endocannabinoids. There are at least two cannabinoid receptor types, CB1 receptors, and CB2 receptors. CB1 receptors are found in high concentrations within the brain and spinal cord. They are also present in certain peripheral cells and tissues (some neurons, some endocrine glands, leukocytes, spleen, heart and parts of the reproductive, urinary and gastrointestinal tracts). CB2 receptors are expressed primarily by immune cells und tissues (leukocytes, spleen and tonsils), but are also found in the brain.
Cannabis sativa L. is the botanical name and Latin binomial of hemp. Until now, there are more than 500 different identifiable chemical constituents known to exist in cannabis. Only a part of these compounds exists in one plant. The most distinctive and specific class of compounds are the cannabinoids (more than 100 known). Other constituents of the cannabis plant are: nitrogenous compounds, amino acids, proteins, glycoproteins, enzymes, sugars and related compounds, hydrocarbons, simple alcohols, aldehydes, ketones, simple acids, fatty acids, simple esters, lactones, steroids, terpenes, non-cannabinoid phenols, flavonoids, vitamins and pigments, elements. The very most of these compounds are found in other plants and animals and are not of pharmacological relevance with regard to the effects exerted by cannabis preparations.
Cannador® (Society for Clinical Research, Germany) is an oral capsule containing a whole plant extract, with standardized THC content and a CBD amount controlled to lie within a fixed narrow range with a THC:CBD ratio of about 2:1. It has been used in several clinical trials and is a registered trademark in many countries. It has been clinically tested for reduction of muscle stiffness, spasms and associated pain in Multiple Sclerosis, for annorexia/cachexia in cancer patients and for post-operative pain management.
Dronabinol is the INN (international non-proprietary name) of the isomer of delta-9-tetrahydrocannabinol that is present in the cannabis plant, the (-)-trans-isomer. This is the only naturally occurring of the four isomers. Oral capsules containing synthetically manufactured dronabinol are available under the name Marinol.
The endogenous ligands of the cannabinoid receptors have been termed endogenous cannabinoids or endocannabinoids. Endocannabinoids are produced by the body of humans and animals. Some endocannabinoids are arachidonyl-ethanolamide (anandamide), 2-arachidonyl glycerol (2-AG), palmitoyl-ethanolamide, 2-arachidonylglyceryl ether (noladin ether), arachidonyl-ethanolamine (virodhamine), and N-arachidonoyl-dopamine (NADA).
Produced by the body, not delivered from external sources. The endogenous cannabinoids are called endocannabinoids.
Hashish is an Arabic name for cannabis resin or compressed resin glands, containing 5-20% or even more THC.
Hemp (Cannabis sativa L.) is an annual plant, normally dioecious, with male and female flowers developing on separate plants. Depending on THC and CBD content hemp can be divided into fibre and drug types. There are regional differences in the employment of the terms cannabis, hemp and marijuana. In the USA and Canada the term "hemp" is usually only applied to fibre hemp in contrast to the term "marijuana", while in many regions of Europe hemp ("Hanf") can be applied to drug types as well (in the sense of the old term "Indian hemp").
A ligand binds to a specific receptor. The ligands of the cannabinoid receptor are called cannabinoids. The endogenous ligands of the cannabinoid receptor are called endocannabinoids.
Marijuana (marihuana) is a colloquial name for dried leaves and flowers of drug cannabis varieties rich in THC (1-20% THC). The median content of THC of confiscated marijuana in the USA in 1997 was 4.2%. Marijuana available on prescription in the Netherlands contains up to 18% THC.
Marinol® (Solvay Pharmaceuticals, Belgium) is a preparation of synthetic dronabinol, dissolved in sesame oil, as capsules of 2.5, 5, and 10 mg dronabinol.
Nabilone (Valeant Pharmaceuticals International, USA) is a synthetic derivative of delta-9-THC with a slightly modified molecular structure, available in some countries on prescription. In Canada, the United States, the United Kingdom and Mexico, nabilone is marketed as Cesamet®.
Sativex® (GW Pharmaceuticals, UK) is a cannabis-based pharmaceutical product containing delta 9-tetrahydrocannabinol (THC) and cannabidiol (CBD) in a 1:1 ratio, delivered in an oromucosal (into the mouth) spray.Because of the use of whole extracts, non-standardized amounts of ballast components are also present, such as minor cannabinoids and terpenoids. Sativex has been approved in Canada as adjunctive treatment for neuropathic pain in adults with multiple sclerosis (MS) and in cancer pain.registration is pending in several European countries.
THC (tetrahydrocannabinol) usually refers to the naturally existing isomer of delta-9-THC, but also may include delta-8-THC. Delta-9-tetrahydrocannabinol and delta-1-tetrahydrocannabinol are two names for the same molecule according to different numbering systems (monoterpenoid and dibenzopyran nomenclature). Generally the natural (-)-trans-isomer of delta-9-THC of the cannabis plant, the (-)-delta-9-trans-tetrahydrocannabinol or dronabinol is designated. Chemically, delta-9-THC is defined as (6aR-trans)-6a,7,8,10a-tetrahy-dro6,6,9-trimethyl-3-pentyl-6H-dibenzo[b,d]pyran-1-ol with a molecular weight of 314.47 Da.