reÂ·ticÂ·uÂ·late. adj. 1. Resembling or forming a net or network: reticulate veins of a leaf. 2. Relating to or being an evolutionary process that involves the exchange of genes between organisms of different species, as in the formation of a new species through hybridization.
Egypt is rich in building and decorative stone, copper and lead ores, gold, and semiprecious stones. These natural resources allowed the ancient Egyptians to build monuments, sculpt statues, make tools, and fashion jewelry. Embalmers used salts from the Wadi Natrun for mummification, which also provided the gypsum needed to make plaster.
The Alchemists of Alexandria developed an elixir made of liquid gold. They believed that gold was a mystical metal that represented the perfection of matter, and that its presence in the body would enliven, rejuvenate, and cure a multitude of diseases as well as restore youth and perfect health. As many as 4,500 years ago, the Egyptians used gold in dentistry. Remarkable examples of its early use have been found by modern archaeologists. Still in favor today as an ideal material for dental work, approximately 13 tons of gold are used each year for crowns, bridges, inlays and dentures.