_Theodolite_ (Vol. iv., p. 383.).--If your correspondent J. S. WOOD will
refer to Todd's _Johnson's Dictionary_, he will find the derivation of
the word thus--
"THEODOLITE (Fr. from θεῶ, Gr., contracted of θεάω, or θεάομαι, to
observe; and δολιχὸς, long. See Morin, _Fr. and Gr. Etym. Dict._),
a mathematical instrument for taking heights and distances."