agathodaemon

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.

ăgăthŏdaemon, ŏnis, m., = ἀγαθοδαίμων (good genius),

a kind of serpent in Egypt to which healing power was ascribed , Coluber Aesculapii, Linn.; Lampr. Heliog. 28.