rectilinear/ˌrektɪˈlɪnɪə(r); ˌrɛktə`lɪnɪɚ/ adj1 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 用直线围著的; 有直线的 a rectilinear figure 直线图形.
牛津英汉双解词典