I’ve complained before about “faux vegetarians” who muck up things for the rest of us by claiming vegetarian status when they still eat chicken. After all, how’s a vegan supposed to get soup in a restaurant if the staff has been trained to think of chicken broth as vegetarian? But, truthfully, there is some value in labels as a means to communicate what one does or doesn’t consume to someone else. Below contains what I consider to be a complete and correct list of the terms currently in use. Please feel free to let me know if you find any of this incorrect or misleading.

The two (well, four) most common types of vegetarians are:

  • Lacto-ovo vegetarians don’t eat beef, poultry, or fish, but do eat eggs and dairy products. (Similarly, lacto vegetarians consume dairy but not eggs while ovo vegetarians eat eggs but don’t consume dairy.)
  • Vegans consume no animal products or animal by-products. This means no beef, poultry, fish, eggs, or dairy (many vegans also avoid honey). Veganism also extends beyond the diet. Vegans avoid leather, wool, silk, down, etc. Some people use the term strict vegetarian for people who follow a vegan diet but still use animal products in other parts of their lives.

There are also some restrictive subcategories of veganism:

  • Fruitarians eat raw fruit and seeds only.
  • Raw/living foodists eat at least 75% uncooked (items may be heated up to 110 degrees), unprocessed, organic fruits and vegetables, with the intention of preserving more vitamins and minerals. There are very few “pure” raw foodists though many people “eat raw” at least occasionally.

Then there are the classifications of vegetarians that aren’t really vegetarians. Their inclusion here does not imply an acceptance of these often confusing, misleading terms, but rather to serve as a reference.

  • Pesco-vegetarians eat no beef or poultry but do eat fish.
  • Pollo-vegetarians eat no beef, but do eat poultry.
  • Semi-vegetarians or Flexitarians eat “less” meat (than who? Most people? Themselves, before? Ted Nugent?)

And, finally, there is the one classification that I made up but at least one person thought I was serious about:

  • Cannibal-vegetarians eat no animal flesh, with the exception of human flesh. These folks might do good to consider starting a company.

This page also has some very good information about classifications and definitions of the varying types of vegetarian.