Noun
See under T.
Source: Webster's dictionaryT-square
A common error is to allow the triangles to push the top of the T-square down slightly, thereby throwing off all angles. Source: Internet
A sliding straightedge known as a T-square is then placed on one of the sides, allowing it to be slid across the side of the table, and over the surface of the paper. Source: Internet
Even tasks as simple as drawing two angled lines meeting at a point require a number of moves of the T-square and triangles, and in general drafting can be a time-consuming process. Source: Internet
The T-square is used to hold other devices such as set squares or triangles. Source: Internet