"pinpoint" in the noun sense
1. pinpoint
a very brief moment
"they were strangers sharing a pinpoint of time together"
2. speck, pinpoint
a very small spot
"the plane was just a speck in the sky"
3. pinpoint
the sharp point of a pin
"pinpoint" in the verb sense
1. pinpoint, nail
locate exactly
"can you pinpoint the position of the enemy?"
"The chemists could not nail the identity of the chromosome"
Source: WordNet® (An amazing lexical database of English)
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