Yes, I'll agree with that, tsuwm, but I don't expect to see falsehooods in a dictionary, either.

Specifically, I object to the statement "under the supervision of a physician." NP's are licensed independent practitioners, not required to practice under physician supervision in most states. Where "supervision" could be said to exist, it is in the form of collaborative practice agreements that give the NP the option of consulting with or referring to the physician, not direct supervision. (Any competent clinician would do that anyway when in doubt.) The supervising physician is not even required to be on-site. The agreements really exist to placate the physicians who view advanced practice nurses as competition.