resin
[rez´in] 1. a solid or semisolid organic substance exuded by plants or by insects feeding on plants, or produced synthetically; they are insoluble in water but mostly soluble in alcohol or ether. adj., adj res´inous.
2. a compound made by condensation or polymerization of low-molecular-weight organic compounds.
acrylic r's products of the polymerization of acrylic or methacrylic acid or their derivatives, used in fabrication of medical prostheses and dental restorations and appliances.
cholestyramine resin a synthetic, strongly basic
anion exchange resin in the chloride form which chelates bile salts in the intestine, thus preventing their reabsorption; used as an adjunctive therapy to diet in management of certain hypercholesterolemias and in the symptomatic relief of pruritus associated with bile stasis.
composite resin a synthetic resin, usually acrylic based, to which a high percentage of ceramic reinforcing filler has been added, such as particles of glass or silica coated with a coupling agent to bind them to the matrix; used chiefly in dental restorations. Called also
composite.
epoxy resin a tough, chemically resistant, adhesive, flexible, dimensionally stable resin of
epoxy polymers; used as denture base material.
ion exchange resin a high-molecular-weight insoluble polymer of simple organic compounds capable of exchanging its attached ions for other ions in the surrounding medium; classified as
(a)cation or
anion exchange resins, depending on which ions the resin exchanges; and
(b) carboxylic, sulfonic, and so on depending on the nature of the active groups.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
pod·o·phyl·lum res·in
a resin extracted from the dried roots and rhizomes of Podophyllum peltatum, a perennial herb common in moist, shady situations in the eastern parts of Canada and the U.S. The drug has been used by Native Americans and members of First Nations as a vermifuge and emetic. The chief constituents of the resin belong to the group of lignins; the most important ones present in podophyllum resin are podophyllotoxin (about 20%), β-peltatin (about 10%), and α-peltatin (about 5%). All three occur both free and as glucosides. The resin was used as a purgative but has been replaced by milder agents. It is cytotoxic and used as a paint in the treatment of genital and other warts.
Farlex Partner Medical Dictionary © Farlex 2012