Common Definitions of Vegetarian and its subcategories

Herbivore: Mainly eats grass or plants. Not necessarily a VEGETARIAN.

Fruitarian: Same as VEGAN, but only eats foods that don't kill the plant (apples can be picked without killing plant, carrots cannot).

Vegetarian: a person who does not eat or does not believe in eating meat, fish, fowl, or, in some cases, any food derived from animals, as eggs or cheese, but subsists on vegetables, fruits, nuts, grain, etc

Lacto-Vegetarian: a vegetarian who consumes dairy products

Lacto-Ovo-Vegetarian: a vegetarian who consumes dairy and egg products

Nonmeat-Eater: Does not eat meat. Most definitions do not consider fish, fowl or seafood to be meat. Animal fats and oils, bonemeal and skin are not considered meat.

Pescetarian: Similar to VEGETARIAN, but also consumes fish. (often is a person avoiding factory-farming techniques...) See also PSEUDO-VEGETARIAN.

Plant-Eater: Mainly eats plants. Not necessarily a VEGETARIAN.

Pseudo-Vegetarian: Claims to be vegetarian, but isn't. Often used by VEGETARIANS to describe SEMI-VEGETARIANs, and PESCETARIANs.

Semi-Vegetarian: Eats less meat than average person. See also PSEUDO-VEGETARIAN.

Strict Vegetarian: name given to vegetarians who do not consume animal products, but not to the extent of vegans

Vegan: a strict vegetarian who eats plant products only, and also does not consume products derived from animals, including but not limited to honey, silk, leather, fur, lanolin, gelatin, and skincare and household products.

Dietary Vegan: a vegetarian who maintains a strict vegetarian diet but doesn’t necessarily exclude the non-food uses of animals.

Vegetable Consumer: Means anyone who consumes vegetables. Not necessarily a VEGETARIAN.

from www.ivu.org