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a resin from certain Caribbean trees, used as a reagent.
guaiac test one for occult blood; glacial acetic acid and guaiac are mixed with the specimen; on addition of hydrogen peroxide, the presence of blood is indicated by a blue tint.
The resin of Guaiacum officinale or G. sanctum (family Zygophyllaceae); a nauseant, diaphoretic, stimulant, and reagent used in testing for occult blood.
Synonym(s): guaiac gum
[Sp. guayaco, imitating the native Carib name]
guaiac/guai·ac/ (gwi´ak) a resin from the wood of trees of the genus Guajacum, used as a reagent and formerly in treatment of rheumatism.
a wood resin, formerly used as a reagent in laboratory tests for the presence of occult blood.
lignum vitaeHerbal medicine
A Caribbean tree that is rich in saponins, resin, guaiaretic and guaiacolic acids; it is anti-inflammatory, laxative and stimulatory, and has been used to treat arthritis and gout; its products have been commercialised in mainstream medicine in the guaiac test for occult bleeding of the large intestine, which is often a sign of colorectal cancer.
Nauseant, diaphoretic, stimulant, and reagent used in testing for occult blood. Also called guaiac gum.
The resin of Guaiacum officinale or G. sanctum; a nauseant, diaphoretic, stimulant, and reagent used in testing for occult blood.