RECTILINEAR Scrabble 13 Words With Friends 16 Definition adjective characterized by a straight line or lines. — synonyms: rectilineal Examples “The crankshaft and connecting rods of an engine convert the rectilinear motion of the pistons to rotary motion of the flywheel.” See all 532 words you can make from RECTILINEAR → 11-letter words Words starting with R Words ending with R ← Unscramble different letters