̷ ̷ˌ ̷ ̷ ̷ ̷ˈāshən noun
( -s )
Etymology: New Latin collineation-, collineatio, from Latin collineatus (past participle of collineare to direct in a straight line, from com- + lineare to make straight, from linea line) + -ion-, -io -ion — more at line
: a mathematical transformation in which collinear elements (as points or lines) are transferred as corresponding elements to another plane or space