The Science of Living Things series demonstrates that Bobbie Kalman and her staff have turned out yet another informative and finely produced series of books. . . . this whole series would make a welcome addition to the elementary school library -- Kay Lehr, Fort Rouge School, Manitoba, Jan. 1999.
perpendicularity - the quality of being at right angles to a given line or plane (especially the plane of the horizon) oblongness, rectangularity - the property of being shaped like a rectangle.
noun. Sensuality is defined as enjoyment of sensual or sexual pleasures, or is defined as a condition of being pleasing to the senses. Appreciating fine silk fabrics and the way they make your skin feel is an example of appreciating the sensuality of silk.