pinpoint

Noun

• the sharp point of a pin

• a very small spot
  • the plane was just a speck in the sky
    

• a very brief moment
  • they were strangers sharing a pinpoint of time together
    

Verb

• locate exactly
  • can you pinpoint the position of the enemy?
    
  • The chemists could not nail the identity of the chromosome
    

Related words

• Synonyms: 
  speck , nail