| guaiac | <chemical> Resin from wood of guajacum officinale l. Or g. Sanctum l., family zygophyllaceae. Used as clinical reagent for occult blood. Pharmacological action: indicators and reagents. Chemical name: Guaiacum (resin) (12 Dec 1998) |
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| guaiac gum | <chemical> Resin from wood of guajacum officinale l. Or g. Sanctum l., family zygophyllaceae. Used as clinical reagent for occult blood. Pharmacological action: indicators and reagents. Chemical name: Guaiacum (resin) (12 Dec 1998) |
| guaiac test | Glacial acetic acid, gum guaiac solution, and hydrogen peroxide are added to an aqueous suspension of the suspected stain; if occult blood or blood pigment is present, a blue colour develops. Synonym: guaiac test, Schonbein's test, van Deen's test. (05 Mar 2000) |
| stool guaiac test | <investigation> A chemical test measures the presence of fresh or decomposed blood. Blood may arise from bleeding anywhere along the gastrointestinal tract, from the mouth to the anus. An easy to perform colourmetric test. (27 Sep 1997) |