castor oil

Also found in: Dictionary, Thesaurus, Medical, Acronyms, Wikipedia.

castor oil,

yellowish oil obtained from the seed of the castor beancastor bean,
bean produced by Ricinus communis, a plant of the spurge family, widely cultivated as an ornamental. Moles die when they eat the roots. It has long been used as an ordeal poison in parts of Africa.
..... Click the link for more information.
. The oil content of the seeds varies from about 20% to 50%. After the hulls are removed the seeds are cold-pressed. Medicinal castor oil is prepared from the yield of the first pressing; this is used as a purgative and laxative. Oil from the second pressing is used as a lubricant for machinery, as a softening agent in making artificial leather, in the dressing of genuine leather, in brake fluids, and in paints and plastic materials. The residue can be used as fertilizer and (after the poisonous substance, ricin, is removed) as cattle feed. Other products having similar properties and uses have been gradually replacing castor oil.

Castor Oil


a fatty vegetable oil obtained from the seeds of the castor-oil plant. It is one of the nondrying liquid oils; it contains 3–9 percent oleic acid, 3–5 percent linoleic acid, and at least 80 percent ricinoleic acid. The high content of the ricinoleic acid is responsible for the properties of castor oil: high kinematic viscosity (more than X 10 -6 m2/sec at 50°C) and density (950–974 kg/m3 at 15°C). Unlike other fatty vegetable oils, it is readily soluble in alcohol but poorly soluble in benzine.

Castor oil is widely known for its medicinal properties. The ancient Egyptians used it to make all kinds of ointments and balms. It is best known for its use as a laxative. Combined with quinine, Pituitrin, pachycarpinum, and other substances, it is used to induce labor. Ointments and balms containing castor oil are used in the treatment of burns and ulcers, softening of the skin, and so forth. Castor oil has also found application in some branches of industry—for example, soap manufacture and oil boiling. Castor oil is a high-grade lubricant.

castor oil

[′kas·tər ¦ȯil]
A colorless or greenish nondrying oil extracted from the castor bean; used as a cathartic, in soap, and after processing as a lubricant, and as a leather preservative. Also known as ricinus oil.

castor oil

a colourless or yellow glutinous oil obtained from the seeds of the castor-oil plant and used as a fine lubricant and as a cathartic
References in periodicals archive ?
Due to its wetting properties, the silicone carbinol fluid disperses pigments more easily than castor oil.
Two grammes of the extracted castor oil was weighed into a 200ml conical flask already containing of 20ml acetic acid--chloroform solution (2 parts of acetic acid to 1 part of chloroform) and 1ml of saturated KI solution (4 parts of KI in 3 parts of distilled water) was added and allowed to stand in the dark for exactly one minute.
Castor oil plant has been used as a barrier within fields of crops or around houses to repel insects.
He wasn't very hungry and found the castor oil packs still extremely soothing.
involving the growth and sale of castor oil plants.
Well, Mr and Mrs Shaw from Honley have a Fatsia japonica in their garden and its common name is the false castor oil plant purely and simply because its foliage resembles that of the true castor oil plant.
The paintings, which trace their origin to Persia, are done by the artists using the metal rod from which the paint mixed in castor oil swirls down on the fabric under the deft guidance of the painter, bringing alive brilliant motifs in myriad hues.
It is expected that castor oil can provide a crosslinking capacity for PUDs, which consequently endows them with excellent mechanical properties.
Among many surfactants that are locally available is castor oil that shares very close chemical and physical properties with silicone oil.
His store sold everything from coffin trimmings to castor oil and violins.
The basic material for bio-diesel is vegetable oil produced from plants that have fatty acid content such as crude palm oil (CPO), castor oil (Jatropha Curcas), coconut, sour soap, sweetsop fruit and kapok.
More than 50,000 tons of castor bean extract exist around the world as a by-product of castor oil production.