There seems to be debate between people in social situations about exactly what vegetarians are. Here are some definitions:
Vegetarian - someone who chooses not to eat meat, poultry, fish or byproducts of meat and fish, such as gelatin.
Lacto-ovo-vegetarian – include eggs and dairy products in their diets
Lacto-vegetarian – avoid eggs
Vegan – vegetarians who avoid dairy products and eggs, and nonfood items produced from animals
*The Vegetarian Cookbook (Nicola Graimes)