One length of a pool (3)
I believe the answer is:
lap
(Other definitions for lap that I've seen before include "One circuit of a course" , "One complete circuit" , "Round in a race" , "Once around the track" , "Circuit of racetrack" .)
I believe the answer is:
lap
(Other definitions for lap that I've seen before include "One circuit of a course" , "One complete circuit" , "Round in a race" , "Once around the track" , "Circuit of racetrack" .)