1. 
   Centrolinead
   The centrolinead was invented by Peter Nicholson, a British mathematician and architect, in 1814. It was used to construct 2-point perspective drawings where one or both vanishing points existed outside the drawing board. Draftsmen could use the instrument in pairs; one for each vanishing point on ...
   Found op http://en.wikipedia.org/wiki/Centrolinead
   
   
2. 
   Centrolinead
   Cen`tro·lin'e·ad noun An instrument for drawing lines through a point, or lines converging to a center.
   Found op http://www.encyclo.co.uk/webster/C/45
   
   
3. 
   Centrolinead
   • (n.) An instrument for drawing lines through a point, or lines converging to a center.
   Found op http://thinkexist.com/dictionary/meaning/centrolinead/
   
   

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