/,rektɪ'lɪnɪə(r); ,rɛktə`lɪnɪɚ/
adj
1 in or forming a straight line 直线的; 形成直线的
*rectilinear motion 直线运动.
2 bounded by or having straight lines 用直线围着的; 有直线的
*a rectilinear figure 直线图形.