There is a car

In this simple sentence, what we call 'there' in grammatical term?

I guess it is an adjective pronoun but not sure about it.

Any help?

Thanks in advance
Someone will come along with the correct terms.

It can be taken two ways.

There's the "existential there," which says simply that something does exist. "There's this car in the used car lot downtown that I really want to buy."
"There's a problem with my TV. Can you fix it?"

Then there's the simple adverb that tells "where" something is. "There goes that red car again, speeding around that corner!"

It's like "here." "Here is the car I've been talking about." "There is the car I've been talking about."

Your example sentence can be taken both ways:
"Here is a car." "There is a car." (demonstrative)
"I hear you've been looking for a new car. Have you found anything yet that you really like?" (reply) "Yes. There is a car." (existential)
AvangiSomeone will come along with the correct terms.
Avangi, your terms are as correct as anyone's! There are no "correct" terms for these things. I have seen there referred to as "existential" (the term you use), "preparatory there" (I think Curme uses that in his Syntax) and "dummy there." There must be other terms as well. May they all live long! Emotion: beer

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Thank you all

Cheers!Emotion: beer

Actually I was hoping to get a term like subject or object kind of things.

Someone will find your answer is very helpful.

I'm sorry if I made you confused.

and Thanks again