Arctŏphylax, ăcis, m., = Ἀρκτοφύλαξ,
the Bear-keeper , a constellation , usu. called Bootes, Cic. Arat. Phaen. 394 B. and K.; id. N. D. 2, 42, 109 (as transl. from Arat. 92); so Luc. 8, 180.
Arctophylax (acis), m , a constellation, Boötes. ...
An Elementary Latin Dictionary