An ovo-lacto vegetarian (or lacto-ovo vegetarian) is a vegetarian who does not eat animal flesh of any kind, but consumes dairy and egg products.
The terminology stems from the Latin lac meaning "milk" (as in 'lactation'), ovum meaning "egg", and the English term vegetarian (see Etymology of vegetarianism for the etymology of "vegetarian"), so as giving the definition of a vegetarian diet containing milk and eggs.
In North America, lacto-ovo vegetarians are the most common type of vegetarian. Generally speaking, when one uses the term vegetarian a lacto-ovo vegetarian is assumed. Lacto-ovo vegetarians are often well-catered to in restaurants and shops, especially in some parts of Europe and metropolitan cities in North America. In the airline industry, a lacto-ovo vegetarian meal is known by the acronym VLML (for Vegetarian, Lacto-ovo MeaL).
In Hinduism many individuals are either raised as ovo-lacto vegetarians or lacto vegetarians. The cow is considered sacred in Hinduism.
The Bible Christian Church was a Christian vegetarian sect founded by William Cowherd in 1809. Cowherd was one of the philosophical forerunners of the Vegetarian Society founded in 1847. The Bible Christian Church promoted the use of eggs, dairy and honey as God’s given food per "the promised land flowing with milk and honey" (Exodus 3:8).
Many Seventh-day Adventist followers are lacto-ovo vegetarians. For over 130 years, Seventh-day Adventists have recommended a vegetarian diet which may include milk products and eggs.
 See also