What is the name of a single spaghetti noodle?

Spaghettoni, I think that's what it's called.

it's a spaghet it's it's kind of spaghet like a spaghetti like me me me italiano like spaghetti one spaghet very very very easy to remember okay one spaghet yes

A single strand of spaghetti is called spaghetti. It's an Italian word, so if a word ends in an I, it is plural. If it ends in an O or an A, it is singular. So the same would be true of fettuccine. Singular would be fettuccino. Same would be true of gnocchi. Singular is gnocco.