Preceptor
Pronunciation : Pre*cep"tor
Part of Speech : n.
Etymology : [L. praeceptor, fr. praecipere to teach: cf. F. pr?cepteur. See Precept.]
Definition : 1. One who gives commands, or makes rules; specifically, the master or principal of a school; a teacher; an instructor.
2. The head of a preceptory among the Knights Templars. Sir W. Scott.
Source : Webster's Unabridged Dictionary, 1913