n. 25B6; noun a pinpoint of light : POINT, spot, speck, dot, speckle.
25B6; adjective pinpoint accuracy : PRECISE, strict, exact, meticulous, scrupulous, punctilious, accurate, careful.
25B6; verb pinpoint the cause of the trouble : IDENTIFY, determine, distinguish, discover, find, locate, detect, track down, spot, diagnose, recognize, pin down, home in on, put one's finger on.