Kashrut

Kashrut (also kashruth or kashrus, כַּשְׁרוּת‎) is the set of Jewish religious dietary laws. Food that may be consumed according to halakha (Jewish law) is termed kosher /ˈkoʊʃər/ in English, from the Ashkenazi pronunciation of the Hebrew term kashér (כָּשֵׁר‎), meaning "fit" (in this context, fit for consumption).

Among the numerous laws that form part of kashrut are the prohibitions on the consumption of unclean animals (such as pork, shellfish (both Mollusca and Crustacea) and most insects, with the exception of certain species of kosher locusts), mixtures of meat and milk, and the commandment to slaughter mammals and birds according to a process known as shechita. There are also laws regarding agricultural produce that might impact the suitability of food for consumption.

...
Wikipedia