mainwheel

noun

1. (alt-of, alternative, uncommon)Alternative spelling of main wheel.

   “Once next to the ball and having aligned the mainwheel with the ball, the student should lean over and pin the ball against the mainwheel with the hand. As the wheelchair continues to move forward, the mainwheel will roll the pinned ball up.”

   “Note the abundant use of the red 2. Staffel trim for the background to I. Gruppe's 'Scottie dog' badge, as well as for the spinner tip and the dive-bomber's individual letter on the aft fuselage and (just visible) the front of the mainwheel spat.”