to preparing an extemporaneous prescription. The mortar and pestle, with the Rod of Asclepius, the Green Cross, and others, is one of the most pervasive symbols of pharmacology, along with the show globe. For pharmaceutical use, the mortar and the head of the pestle are usually made of porcelain, while the handle of the pestle is made of wood. This is known as a Wedgwood mortar and pestle and originated in 1759. Today the act of mixing ingredients or reducing the particle size is known as trituration. Mortars and pestles are also used as drug paraphernalia to grind up pills to speed up absorption when they are ingested, or in preparation for insufflation. To finely ground drugs, not available in liquid dosage form is used also if patients need artificial nutrition such as parenteral nutrition or by nasogastric tube. Food preparation Mortars are also used in cooking to prepare wet or oily ingredients such as guacamole, hummus and pesto (which derives its name from the pestle pounding), as well as grinding spices into powder. The molcajete, a version used by pre-Hispanic Mesoamerican cultures including the Aztec and Maya, stretching back several thousand years, is made of basalt and is used widely in Mexican cooking. Other Native American nations use mortars carved into the bedrock to grind acorns and other nuts. Many such depressions can be found in their territories. In Japan, very large mortars are used with wooden mallets to prepare mochi. A regular sized Japanese mortar and pestle are called a suribachi and surikogi, respectively. Granite mortars and pestles are used in Southeast Asia, as well as Pakistan and India. In India, it is used extensively to make spice mixtures for various delicacies as well as day to day dishes. With the advent of motorized grinders, use of the mortar and pestle has decreased. It is traditional in various Hindu ceremonies (such as weddings, and upanayanam) to crush turmeric in these mortars. In Malay, it is known as batu lesung. Large stone mortars, with long (2–3 foot) wood pestles were used in West Asia to grind meat for a type of meatloaf, or kibbeh, as well as the hummus variety known as masabcha. In Indonesia and the Netherlands mortar is known as Cobek or Tjobek and pestle is known as Ulekan or Oelekan. The chobek is shaped like a deep saucer or plate. The ulekan is either pistol-shaped or