1 Connecticut Children's Medical Center-Volunteer opportunities are available for anyone who is 13 years old, dependable, and able to commit to at least three hours of service per week for a minimum commitment of one year (six weeks during the Summer period). Children's Hospital Central California-We can match your skills and interests with a volunteer position that meets your needs and ours! 2  Whether it's playing with children in the Child Life Playroom, visiting with family members, or providing clerical support in an office setting, you can make a difference.
Definition of tractor - a powerful motor vehicle with large rear wheels, used chiefly on farms for hauling equipment and trailers. Definition of tractor - a powerful motor vehicle with large rear wheels, used chiefly on farms for hauling equipment and trailers.
Originally, a rotating airfoil behind the aircraft, which pushes it, was called a propeller, while one which pulled from the front was a tractor. Later the term 'pusher' became adopted for the rear-mounted device in contrast to the tractor configuration and both became referred to as 'propellers' or 'airscrews'.