pitch
The rate at which a roof or other surface slopes, usually given in degrees or expressed as a ratio of vertical to horizontal. Photo from Metuchen, New Jersey, 2019. 2. The crosswise number of tuft-forming pile yarns in a 27-inch (686 mm) width of woven carpet. 3. The resinous sap that exudes from various conifers. 4. The distance between two corresponding points on adjacent threads of a screw, nut, or bolt. 5. The predominant frequency of a sound as perceived by the human ear. (Kremer, 2017)