WordNet (r) 3.0 (2006):

seek time
    n 1: (computer science) the time it takes for a read/write head
         to move to a specific data track

The Free On-line Dictionary of Computing (30 December 2018):

seek time

    The time it takes for a disk drive to move its
   head(s) from one track to another.  The seek time depends on
   the power of the servo, the mass of the heads, the number of
   tracks traversed and the time taken to position the heads over
   the target track accurately enough to start data transfer.

   See also: average seek time, minimum seek time, maximum
   seek time.

   (1997-07-15)