Why is the third hand on the clock called the second hand

Why is the third hand on the clock called the second hand?

Because it counts the SECONDS. Each hand is named for the amount of time it tells. Hours, minutes, and seconds are told by the hour hand, minute hand, and second hand. Each time each of these movies, it counts for that unit of time, whether it be counting one second for each tick of the second hand, one minute for each click of the minute hand (60 clicks of the second hand), and one hour for each click of the hour hand (60 clicks of the minute hand [3600 clicks of the second hand]).