teriku geomeetria koordinaattasand – lõikeserva valitud punkti läbiv tasand, mis on risti põhitasandiga ning paralleelne ettenihke sihiga (vt põhitasand), one of the planes used as reference to describe the geometry of a single-point tool - a plane perpendicular to the reference plane and containing the direction of feed motion (see: reference plane)