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practitioner (n.)
1540s, "one who acquires knowledge from actual practice;" a hybrid formed from practitian "practitioner" (c. 1500; see practician), with redundant ending on model of parishioner. Meaning "one engaged in the actual practice of an art or profession" is from 1550s. Johnson has as a secondary sense "One who uses any sly or dangerous arts" (compare practice (n.)). A general practitioner originally was "someone who practices both medicine and surgery."
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Definitions of practitioner from WordNet
Dictionary entries near practitioner
practiced
practician
practicing
practicum
practise
practitioner
Prado
prae-
praecipe
praenomen
Praesepe