theodolite
Concise Oxford English Dictionary © 2008 Oxford University Press:
theodolite /θɪˈɒdəlʌɪt/
▶noun a surveying instrument with a rotating telescope for measuring horizontal and vertical angles.
– derivatives
theodolitic adjective.
theodolitic adjective.
– origin C16: from mod. L. theodelitus, of unknown origin.
'theodolite' also found in these Oxford entries:

