Dictionaryphysi'cian's assis'tanta person trained to perform under the supervision of a physician many clinical procedures traditionally performed by a physician, as diagnosing and treating minor ailments. Abbr.: PA Also,physi'cian assis'tant.Cf. nurse-practitioner. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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