[n] the sharp point of a pin
[n] a very small spot; "the plane was just a speck in the sky"
[n] a very brief moment; "they were strangers sharing a pinpoint of time together"
[v] locate exactly; "can you pinpoint the position of the enemy?"; "The chemists could not nail the identity of the chromosome"
dapple, fleck, instant, locate, maculation, minute, moment, patch, point, second, speckle, spot, turn up