·noun A word used in asking questions; as, who? which? why?.
II. Interrogative ·adj Denoting a question; expressed in the form of a question; as, an interrogative sentence; an interrogative pronoun.
interrŏgātīvē, adv., v. interrogativus fin. ...
A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.