n. an instrument with a graduated arc of 60(0) used in navigation and surveying for measuring the angular distance of objects by means of mirrors.
[ L sextans -ntis sixth part f. sextus sixth ]
n. an instrument with a graduated arc of 60(0) used in navigation and surveying for measuring the angular distance of objects by means of mirrors.
[ L sextans -ntis sixth part f. sextus sixth ]
Concise Oxford English dictionary. Краткий оксфордский словарь английского языка. 2012