From [Wikipedia]: Vegetarianism is the practice of following a plant-based diet including fruits, vegetables, cereal grains, nuts, and seeds, with or without dairy products and eggs. A vegetarian does not eat meat, including red meat, game, poultry, fish, crustacea, and shellfish, and may also abstain from by-products of animal slaughter such as animal-derived rennet, found in some cheeses, and gelatin.1