diagraph（n.）
"无需艺术技巧绘制物体的工具"，1847年； 见 dia- + -graph。
It consists of a carriage for a pencil governed by a system of cords and pulleys working at right angles to one another, and set in motion by the movement of a pointer, which is passed by the operator, who is careful to keep his eye at a fixed point of view, around the apparent outlines of his subject. The pencil describes on the paper the exact motions of the pointer, and thus reproduces the desired object. [Century Dictionary]
它由一个笔架组成，由一组相互垂直的绳索和滑轮控制，由操作者通过一个指针传递并保持视线在固定的视角上，沿着主题的表面轮廓移动。铅笔在纸上描述指针的精确运动，从而再现所需的物体。[世纪词典]
早期它的意思是“描述”（1798年）。
该词起源时间：1847年