The rate at which a rooforothersurface slopes, usually given in degrees or expressed as a ratio of verticalto horizontal. 2. The crosswise number of tuft-forming pile yarns in a 27-inch (686 mm) width of woven carpet. 3. The resinous sapthat exudes from various conifers. 4. The distance between two corresponding points on adjacent threads of a screw, nut, orbolt. 5. The predominant frequency of a sound as perceived by the human ear. (Kremer, 2017)
