Rectilineally

Rectilineal Rec`ti*lin"e*al (-l?n"?*al), Rectilinear Rec`ti*lin"e*ar (-l?n"?*?r), a. [Recti- + lineal, linear.] Straight; consisting of a straight line or lines; bounded by straight lines; as, a rectineal angle; a rectilinear figure or course. -- {Rec`ti*lin"e*al*ly}, adv. -- {Rec`ti*lin"e*ar*ly}, adv. [1913 Webster]