camphor

cam·phor

C0055100 (kăm′fər)n. A fragrant white or colorless crystalline ketone, C₁₀H₁₆O, obtained naturally from the wood of the camphor tree or synthesized from pinene and used as an insect repellent, in the manufacture of film, plastics, lacquers, and in medicine chiefly in external preparations to relieve mild pain and itching.

[Middle English caumfre, from Anglo-Norman, from Medieval Latin camphora, from Arabic kāfūr, possibly from Malay kapur; akin to Sanskrit karpūraḥ.]

cam′phor·a′ceous (kăm′fə-rā′shəs) adj.cam·phor′ic (-fôr′ĭk) adj.

camphor

(ˈkæmfə) n (Elements & Compounds) a whitish crystalline aromatic terpene ketone obtained from the wood of the camphor tree or made from pinene: used in the manufacture of celluloid and in medicine as a liniment and treatment for colds. Formula: C10H16O[C15: from Old French camphre, from Medieval Latin camphora, from Arabic kāfūr, from Malay kāpūr chalk; related to Khmer kāpōr camphor] camphoric adj

cam•phor

(ˈkæm fər)

n. a white, pleasant-smelling terpene ketone, C₁₀H₁₆O, used chiefly in making celluloid, as a counterirritant, and as a moth repellent. [1275–1325; Middle English caumfre < Anglo-French < Medieval Latin camphora « Arabic kāfūr < Malay kapur] cam•phor′ic (-ˈfɔr ɪk, -ˈfɒr-) adj.

cam·phor

(kăm′fər) A white, gum-like, crystalline compound, C₁₀H₁₆O, having a strong odor and evaporating easily. It is used as an insect repellent and in making plastics and explosives.

Thesaurus

Noun

camphor - a resin obtained from the camphor tree; used in making celluloid and linimentcamphor ball, mothball - a small sphere of camphor or naphthalene used to keep moths away from stored clothingnatural resin - a plant exudatecelluloid - highly flammable substance made from cellulose nitrate and camphor; used in e.g. motion-picture and X-ray film; its use has decreased with the development of nonflammable thermoplastics

Translations

樟脑

camphor

(ˈkӕmfə) noun a strongly scented whitish substance, used for various medical and industrial purposes. Mothballs contain camphor.樟脑

camphor

(kăm`fər), C₁₀H₁₆O, white, crystalline solid ketoneketone
, any of a class of organic compounds that contain the carbonyl group, C=O, and in which the carbonyl group is bonded only to carbon atoms. The general formula for a ketone is RCOR′, where R and R′ are alkyl or aryl groups.
..... Click the link for more information. with a characteristic pungent odor and taste. It melts at 176&degC; and boils at 204&degC;. The natural variety, Japan camphor, is obtained by steam distillation of the wood of the camphor tree (Cinnamomum camphora) native to China, Japan, and Taiwan (its chief natural source). Since this source is inadequate, camphor is widely synthesized from α-pinene, which is obtained from oil of turpentine. Camphor is widely used as a plasticizer in the manufacture of celluloid and some lacquers. It is used in medicine as a stimulant, a diaphoretic, and an inhalant. Camphor ice is a mixture, containing principally camphor and wax, used for external application. Camphor is practically insoluble in water but soluble in alcohol, ether, chloroform, and other solvents. The alcoholic solution is known as spirits of camphor.

camphor

Tall 100 ft (30m) tree with waxy glossy leaves that smell like camphor when crushed. Masses of small white flowers, black berry-like toxic fruit. Very rough bark with vertical fissures. The tree has very strong volatile compounds and is considered toxic, but many people make tea from young leaves and shoots. Gum and bark are used for digestive upset, circulation, pain, nerves, multiple sclerosis, hepatitis, skin conditions. Camphor steam used for colds, sinus infections. It is said inhaling too much affects central nervous system. Sometimes used to make “fake Eucalyptus” oil. Be careful. Keep kids away, and definitely do not take if pregnant. Keeps insects away in closet.

Camphor

l, 7, 7-trimethylbicyclo-(l, 2, 2)-heptanone-2, a ketone of the terpene series; colorless crystals with a characteristic odor. Camphor is highly volatile; it is slightly soluble in water but readily soluble in organic solvents. It exists in the form of two optically active isomers, the (+)- and (−)-forms (melting points, 178.5°-179°C), and in the form of a racemic mixture, the (±)-form (melting points, 178°-178.5°C).

Camphor is widespread in nature; it is a component of many essential oils, such as basil oil, oil of wormwood, and oils of coniferous trees and the camphor tree. Camphor-tree oil is a source of (+)-camphor, or so-called natural camphor. Industrial camphor, in the (±)-form, is produced by processing of turpentine or its basic component, pinene. Camphor is used mainly as a plasticizer of cellulose nitrate and acetate (in the production of celluloid and motion-picture film), as an inhibitor (an additive that increases the storage stability) for smokeless powder, and as a moth repellent.

Camphor is a medicinal substance of the group of nerve stimulants. It stimulates respiration and blood circulation and strengthens the metabolic processes in the heart muscle. It is injected subcutaneously in the form of “camphor oil” (camphor solution in peach oil) or taken internally in powders (ground camphor) and in gelatin capsules in cases of cardiac weakness or collapse, to stimulate respiration, and in cases of infectious diseases and cases of narcotic and barbiturate poisoning. Bromo-camphor (in powder or tablet form) and Kamfotal tablets (containing bromocamphor and phenobarbital) are prescribed as sedatives for the central nervous sytem in cases of high nervous excitability, neurasthenia, and heart neurosis. Camphor is used in the form of camphor oil, camphor ointment, camphor spirits, and Denta drops (dental drops containing camphor, chloral hydrate, and alcohol) as irritants and analgesics, and partly as antiseptics. These preparations are applied as salves in cases of inflammations and rheumatism; the dental drops are introduced into tooth defects.

REFERENCES

Rudakov, G. A. Khimiia i tekhnologiia kamfory. Moscow-Leningrad, 1961.

camphor

[′kam·fər] (organic chemistry) C₁₀H₁₆O A bicyclic saturated terpene ketone that exists in optically active dextro and levo forms and as a racemate; the dextro form is obtained from the wood and bark of the camphor tree, the levo form is found in some essential oils, and the inactive form is obtained from an Asiatic chrysanthemum or made synthetically from certain terpenes.

camphor

a whitish crystalline aromatic terpene ketone obtained from the wood of the camphor tree or made from pinene: used in the manufacture of celluloid and in medicine as a liniment and treatment for colds. Formula: C₁₀H₁₆O

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Words related to camphor

noun a resin obtained from the camphor tree

Related Words