Vegetarianism is a lifestyle choice that involves abstaining from the consumption of meat and fish. The term VEGAN, which has five letters, refers to a type of vegetarian who does not consume any animal products, including dairy and eggs. MEATLESS, with eight letters, is another term for vegetarianism, referring to the absence of meat in one's diet. OVO, with three letters, is a type of vegetarianism that allows the consumption of eggs but not dairy products.