The Collaborative International Dictionary
Training wheels \Train"ing wheels\ a pair of small wheels attached to the rear of a bicycle to keep the bicycle upright; -- used to assist those, especially small children, learning how to ride a bicycle.
Wiktionary
n. 1 A pair of small wheels attached on either side of the rear wheel of a child's bicycle so that the bicycle is easy for the child to learn to ride. 2 {{context|figuratively|sometimes singular as (term training wheel English)|lang=en}} Anything designed to make something easier for a novice.
Wikipedia
Training wheels (or stabilisers in British English) are an additional wheel or wheels mounted parallel to the rear wheel of a bicycle that assist learners until they have developed a usable sense of balance on the bicycle. Typically they are used in teaching very young children to ride a bike, although versions for adults exist.
Training Wheels is a song recorded by Melanie Martinez for her album Cry Baby. Released as the fourth single on November 10, 2015, the lyrics, described by Martinez, talks about "taking their relationship to the next level". The music video was released on November 10, 2015, as a double feature to her music video for Soap.
Category:2015 songs
Usage examples of "training wheels".
We take the training wheels off after the Navy pukes leave the shipyard.
Surrender clears the way, opening a path that he plunges along, like a youth just released from training wheels, spinning ecstatically down a swooping ramp he never knew beiore, whose curves change in dellghtiulty ominous ways.
I guess it doesn't matter, since g'Keks get to change sex after their training wheels fall off, and if she wants to stay female, that's her business.
At her mother's insistence she had tried riding it several times without the training wheels and nearly fell headlong onto the concrete of the driveway.
That made it three large men with guns against himself and Sorensen, both unarmed, and a little girl who probably didn't even have the training wheels off her bike.
Like giant training wheels, landing gear extended from the two engines closest to the bullet-shaped fuselage.