Very thin spaghetti, thinner than regular spaghetti.
Spaghettinis are like long, thin strings that you eat with sauce.
Examples:
She cooked spaghettinis for dinner.
Do you like spaghettinis with meatballs?
The spaghettinis are in the cupboard.
He ate a whole plate of spaghettinis.
I have never seen so many spaghettinis in one bowl!
The spaghettinis were as long as the table!