This has no bearing on what the charge would have been (like stopdog said, it would depend on your state), but thought you might find this definition helpful anyway.

Here is what the International Criminal Court defines rape as:

The perpetrator invaded the body of a person by conduct resulting in penetration, however slight, of any part of the body of the victim or of the perpetrator with a sexual organ, or of the **** or genital opening of the victim with any object or any other part of the body.

Similarly the FBI Uniform Crime Reporting defines rape as:

Penetration, no matter how slight, of the vagina or **** with any body part or object, or oral penetration by a sex organ of another person, without the consent of the victim.