Whip-it Reference Removed From Demi Moore 911 Tape

Sources tell us ... the Deputy City Attorney assigned to the case heard references to whip-its and felt it would be an invasion of privacy if that information was released to the public -- so it was cut out of the tape, along with specific references to other drugs.

TMZ broke the story ... paramedics on scene were told Demi had used whip-its to inhale nitrous oxide just before she lapsed into semi-consciousness and exhibited seizure-like symptoms.