(idiomatic) To do work unnecessarily when it has already been done satisfactorily by others; to attempt to devise a solution to a problem when a solution already exists.

plural of scroll wheel

plural of Geneva wheel

plural of mouse wheel

A turntable type of machine used by a potter to form round pieces of pottery from wet clay.

(figuratively) Anything designed to make something easier for a novice.

plural of training wheel

plural of steel wheel

(computing) A hard plastic or rubbery disc on a computer mouse, used for scrolling. / (engineering) A cog wheel in the form of a scroll.

(software) a method of database searching that produces an instantly refreshed list of results as the user enters each character of the term.