"== plants ==

I find the first sentences of this article very strange. I don't think vegetarians primarily eat plants or that it's synonymous with herbivore. Nuts, fruits, seeds, tubers, sprouts, beans, honey, and yogurt, are not plants. Even plant parts is a bit of a stretch. Is flour a plant? My understanding is that vegetarians do not eat meat.   
It looks like an accurate description to me. Nuts, fruits, seeds, tubers, beans, and flour all come from plants - I don't think it's necessary to eat the whole plant to be considered to be eating plants. Plants aren't even mentioned in the first sentences of the article.  
I see that mention of plants has recently been removed. The word vegetarian obviously indicates a plant-based diet.  
A nut may come from a tree, but it is not a plant. See dictionary. Yogurt is not a plant. Honey is not a plant. Fruit is not a plant. You seem to be confusing the meaning of words, which is problematic for someone working on an encyclopedia.   
I think you'll find that trees are plants. Foods that come from plants are plant-based foods. It isn't rocket science.  
The article seems have been clarified which is helpful. Clearly there is a difference between a herbivore (a moose or cow for example) and a vegetarian that eats plant based foods like nuts, fruit and sometimes non-plant based foods dairy. Cheers.   
I removed a newly-added sentence in the intro saying ""Some vegetarians eat eggs and fish"" because the very next sentence says exactly the same thing.   

I removed ""focusing on plant-based foods"", since a diet of solely dairy products and eggs, while unhealthy, would technically be vegetarian. Simply put, not all vegetarian diets ""focus"" on plant-based foods. As per the citations, vegetarianism is really just defined by what it excludes, not what it includes. -  
It would only be true of certain forms of vegetarianism, so the plant-based nature of the diet needs to be included.  
What about fungi? They aren't plants are they?   
Fungi are fungi, not plants. Sigh... vegetarians... '' (T↔C) 
Correct, they are not plants. Just in case anyone is still confused: nuts, fruits, seeds, tubers, sprouts, beans, and flour are all plant-based foods; they come from plants. Honey, yogurt, other dairy products, and eggs are animal-based foods; mushrooms and yeast are fungus-based foods; and algae (including edible seaweed like kelp) are none of the above. Also for the record, I'm vegetarian. -  
(response to Michig) I don't understand your logic here. If some vegetarian diets do not focus on plant-based foods, then would it not be inaccurate to make the blanket statement ""vegetarian diets focus on plant-based foods""? -  
Can you seriously imagine a vegetarian diet without plant-based foods? The lede should summarize the article, and if you read the article it discusses plant-based foods all the way through it. The Vegetarian Society's definition: ""We define a vegetarian as someone living on a diet of grains, pulses, nuts, seeds, vegetables and fruits, with or without the use of dairy products and eggs. A vegetarian does not eat any meat, poultry, game, fish, shellfish or crustacea, or slaughter by-products."" Doesn't that sound very plant-based to you? The plant-based foods are the fundamental part of the diet, with some'' types of vegetarians also adding dairy and eggs.   
The (sourced) entence ""The vegetarian diet is generally based on fruits, vegetables, cereal grains, nuts, and seeds"" was removed, which would have helped