Since the earliest of times the Great Pyramid of Giza (Arab. Al Jizah) along with its 2 other main pyramids have been considered one of the wonders of the world. We're talking about a society where they didn't have cameras, You didn't see great images.
Patient care  diagnostic tools, tests, procedures. Stool guaiac test. Definition: A test that detects the presence of hidden (occult) blood in the stool. The stool guaiac is the most common form of Fecal Occult Blood test (FOBT) in use today. Brand names include: Hemoccult, Hemoccult SENSA, ColoScreen, ColoScreen-ES, Seracult, and Seracult PlusÂ®.
[gwiÂ´ak] 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.