occult blood test


occult

 [ŏ-kult´] obscure or hidden from view.occult blood test examination by microscope or chemical test of a specimen (such as feces, urine, or gastric juice) for presence of blood that is not otherwise detectable. Feces are tested when intestinal bleeding is suspected but there is no visible evidence of blood.

occult blood test

A screening test for disorders of the gastrointestinal tract, including anemias that may be caused by gastrointestinal blood loss. See: fecal occult blood test