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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.
an obsolete test using glacial acetic acid, gum guaiac solution or hydrogen peroxide to detect traces of fecal or occult blood.
Synonym(s): Almén test for blood
a test, using guaiac as a reagent, formerly performed on feces and urine for detecting occult blood in the intestinal and urinary tracts.
guai·ac test(gwī'ak test)
A screening procedure for occult blood in stool.
Almén,August Teodor, Swedish physiologist, 1833-1903.
a tree resin from Guajaaem officinale; used in a test for occult blood in the feces.