dēmonstrātor, ōris, m. [demonstro],
one who points out or indicates; an indicator, exhibiter (very rare): uniuscujusque sepeliendi, * Cic. de Or. 2, 86, 353: hujus rationis, Col. 3, 10, 20: medicinarum Aesculapius, Tert. Apol. 23.
dēmōnstrātor ōris, m demonstro, one who points out, an indicator, guide : unius cuiusque sepeliend...
An Elementary Latin Dictionary
·noun A teacher of practical anatomy. II. Demonstrator ·noun One who demonstrates; one who proves a...
Webster's Dictionary of the English Language