Noun
One who gives commands, or makes rules; specifically, the master or principal of a school; a teacher; an instructor.
The head of a preceptory among the Knights Templars.
Source: Webster's dictionaryAs a senior in the nursing department, Stets is required to have preceptor shifts, which are essentially nursing internships. Source: Internet
I then began noticing other things: a discussion I overheard on the molecular feasibility of Spiderman’s genesis, a joking remark about disguising ignorance with a white-coat-wearing alter ego, a preceptor dubbed the “Superman of Hearts.” Source: Internet