animal welfare: The protection of the health and well-being of animals.

Animal Welfare Act: U.S. law passed in 1966 that sets the standards for the handling, housing, feeding, and caring of animals in laboratories, zoos, circuses, and pet stores.

cruelty-free products: Products that have not been tested on animals.

Draize test: Test that drops a product into rabbits' eyes to determine whether the product will cause irritation or harm in a person's eyes.

endangered species: Animals that are in danger of becoming extinct.

free-range farms: Farms where animals are given relative freedom to roam and forage.

fur farms: Farms where fur-bearing animals, such as mink, are raised for the use of their pelts.

intensive farming: Farming characterized by large-scale housing of animals and mechanization methods.

in vitro tests: Tests conducted outside of an animal or human body in an artificial environment.

Lethal Dose 50 Percent (LD50) test: Test that...