What part of speech is the word "undergrads" from following sentence?

Hi!

Obviously it's a noun because it's in plural form.
I wonder if you could also use the adjective form of it.

It is a noun. "Undergrads" are those who are enrolled in a college or university who haven't yet yet completed a baccalaureate degree. It is the shortened form of the word "undergraduates."

The word "undergraduate" can be used as either a noun or an adjective. As an adjective take the example, "Please meet me in the undergraduate reading room later this afternoon." As a noun, "I am giving a guided tour of the university later to some prospective undergraduates."

You already know that "undergrad" can be used as a noun

Hi hmea!

I was thinking about the adjective form of it (of course without the 's' at the end).
And I was also thinking that instead of 'undergrads', we could replace it with 'undergrad' (as an adj.).
Could that be possible in the given sentence above?
Thanks!

frostwhiteHi!Obviously it's a noun because it's in plural form.I wonder if you could also use the adjective form of it.

Yes it is a noun. I wouldn't say it has an adjective form although that's my opinion.

(Undergrad is short for undergraduate).

Frostwhite, I've never heard or seen "undergrad" used as an adjective. Could a person therefore say, "undergrad reading room," instead of "undergraduate reading room"? You would be understood if you said either version, but I still don't think "undergrad" is an adjective. Also, saying "undergrad reading room" sounds non-normative and I don't think it would ever pass as proper grammar if you we

Hi!

hmea1I don't think it would ever pass as proper grammar if you were to say it to someone

Now I know.
I was just curious that's why I asked.

Thanks Sir!