Tetrahedral co-ordinates are a system of quadriplanar co-ordinates, the fundamental planes being the faces of a tetrahedron, and the co-ordinates the perpendicular distances of the point from the faces, a positive sign being given if the point be between the face and the opposite vertex, and a neg
neg הגייה עם משמעויות, מילים נרדפות, הפכים, תרגומים, משפטים ועוד