noun
1. : triangle 3e
2. : a drafting instrument having a straightedge that may be set at any desired angle with an edge of the drawing board
3. : a try square with an adjustable sliding head
noun
1. : triangle 3e
2. : a drafting instrument having a straightedge that may be set at any desired angle with an edge of the drawing board
3. : a try square with an adjustable sliding head
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012