"Vegetarianism is the practice of a diet that excludes meat (including game and slaughter by-products), fish (including shellfish and other sea animals) and poultry. There are several variants of the diet, some of which also exclude eggs and/or some products produced from animal labour such as dairy products and honey. The vegan diet is a form of vegetarianism which excludes all animal products from the diet, such as meat, poultry, fish, dairy products, eggs, and honey. Those who practice veganism for ethical reasons often exclude animal products from their diet as part of a larger practice of abstaining from the use of animals for any purpose (e.g. leather, fur, etc.), often out of support for animal rights. Most vegetarians consume dairy products, and many eat eggs. Lacto-vegetarianism includes dairy products but excludes eggs, ovo-vegetarianism includes eggs but not dairy, and lacto-ovo vegetarianism includes both eggs and dairy products. Semi-vegetarianism consists of a diet largely of vegetarian foods, but may include fish and sometimes even poultry, as well as dairy products and eggs. The association of semi-vegetarianism with vegetarianism in popular vernacular, particularly pescetarianism (also called pesco-vegetarianism and described as a "vegetarian" diet that includes fish), has led to what vegetarian groups cite as improper categorisation of these diets as vegetarian. The Vegetarian Society, which initiated popular usage of the term vegetarian as early as 1847, condemns the association of semi-vegetarian diets as valid vegetarianism; the organisation points out that the consumption of fish is not vegetarian." "Foods in the main vegetarian diets: Diet name Meat, poultry, fish Eggs Dairy Honey Lacto-ovo vegetarianism: No Yes Yes Yes Lacto vegetarianism: No No Yes Yes Ovo vegetarianism: No Yes No Yes Veganism: No No No No Other dietary practices commonly associated with vegetarianism: - Fruitarianism is a diet of only fruit, nuts, seeds, and other plant matter that can be gathered without harming the plant. - Su vegetarianism originating in Buddhism, excludes all animal products as well as the fetid vegetables: onion, garlic, scallions, leeks, or shallots. - Macrobiotic diet is a diet of mostly whole grains and beans. Not all macrobiotics are vegetarians, as some consume fish. - Raw veganism is a diet of fresh and uncooked fruit, nuts, seeds, and vegetables. - Dietary veganism: whereas vegans do not use animal products of any kind, dietary vegans restrict their veganism to their diet. Some vegetarians also avoid products that may use animal ingredients not included in their labels or which use animal products in their manufacturing i.e. cheeses that use animal rennet, gelatin (from animal skin, bones, and connective tissue), some sugars that are whitened with bone char (e.g. cane sugar, but not beet sugar) and alcohol clarified with gelatin or crushed shellfish and sturgeon. Vegetarians who eat eggs sometimes prefer free-range eggs (as opposed to battery farmed eggs)." Source and further information: http://en.wikipedia.org/wiki/Vegetarianism