There was a trend in the 80-90 to separate the diet and vegetable-based diets into ovo-lacto-vegetarianism and vegetarianism.

There has been a debate recently with so many "veggie" trends to revive the term in that way. With cuestionable changes to the definition of veganism implied, which like vegetarianism whose current definition comes from the vegetarian society, the definition of veganism comes from the vegan society.

The concepts have been very separated since then.