/traɪˌæŋɡjuˈleɪʃn/
tri·angu·la·tion
BrE /traɪˌæŋɡjuˈleɪʃn/
NAmE /traɪˌæŋɡjuˈleɪʃn/
[U] (specialist)
a method of finding out distance and position, usually on a map, by measuring the distance between two fixed points and then measuring the angle from each of these to the third point