Lying on the same straight line; points or objects that are positioned so they form a single line.
From Latin 'col-' (together) and 'linearis' (of a line), meaning positioned together on one line.
Collinear points are so important in computer graphics and navigation that programmers constantly check if points are collinear—if they are, the computer can take a shortcut because no 2D space exists between them!
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