Vegetarian:
A person who doesn't eat the flesh of animals, birds or fish.
Lacto-Vegetarian:
A person who doesn't eat the flesh of animals, birds or fish, but
who consumes dairy products.
Ovo-lacto-vegetarian:
A person who doesn't eat the flesh of animals, birds or fish, but
who consumes eggs and dairy products.
Vegan:
A person who doesn't consume or use any animal products. This
means not eating the flesh of animals, birds or fish, not
consuming dairy products and eggs, and not using animal products
such as leather, wool, silk and feathers.
Epidemiologist:
One who studies the relationships of the various factors
determining the frequency and distribution of diseases in a human
community.
Nutrition:
The scientific study of food and the processes by which it it
digested and assimilated.
Carnivore:
An animal, including some humans, who feeds on flesh.