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Definition of rectilineal : Alt. of Rectilinear

Synonyms:

one-dimensional, linear, rectilinear

Usage examples:

• Rectilineal figures are divided into triangles, quadrangles, pentagons, etc. - "Logic, Inductive and Deductive", William Minto.
• Before leaving his rectilineal room, he had dressed himself with his valet Neumann's help with all possible care, as his life in the public eye required. - "Royal Highness", Thomas Mann.
• It is as follows: The straight line drawn at right angles to the diameter of a circle at its extremity will fall outside the circle, and into the space between the straight line and the circumference another straight line cannot be interposed; further, the angle of the semicircle is greater and the remaining angle less than any acute rectilineal angle. - "The Teaching of Geometry", David Eugene Smith.