κατοπτήρ

ῆρος, ὁ
A. spy, scout, A. Th. 36 (pl.).
II. = ἑδροδιαστολεύς, Hp. Fist. 3, Haem. 5 (κάτοπτρον Erot.).
Liddell, Scott & Jones
A Greek-English Lexicon, 1940
An open-access project