The judge in the federal trial of alleged "underwear bomber" Umar Farouk AbdulMutallab refused Tuesday to prevent the prosecution from calling the device he allegedly carried a "bomb."

U.S. District Judge Nancy Edmunds also refused to exclude a photo of AbdulMutallab's burned genitals from the evidence.

Before the prosecution began its opening statement, defense standby counsel Anthony Chambers asked that the prosecutors not be allowed to use the words "explosive device" or "bomb" during the trial. It's up to the jury to decide whether the device AbdulMutallab was carrying was a bomb, Chambers argued.

"I'm going to deny that motion," responded Edmunds. "It makes no sense whatsoever."

As for the photo, the judge said it did not seem "unusually prejudicial."