Sign of the article
. punto

, virgola

? punto interrogativo

! punto scrimativo ( I am not sure, I can not find it in a dizionario)

Question

Sign of the article
.     punto

,    virgola

? punto interrogativo

! punto scrimativo ( I am not sure, I can not find it in a dizionario)

Answer

! is "punto esclamativo", similar to English exclamation mark. Your dictionary should at least have the verb esclamare=to exclaim. Esclamativo means "that exclaims", because you use it to mark something that you are exclaiming in writing, e.g. to represent an exclamatory inflection.

Answer

! punto esclamativo, gli altri sono giusti