The term "cusp" is employed in literature to evoke a sense of a pointed edge or transitional moment, whether in concrete descriptions or as a metaphor for change. In anatomical or technical contexts, it denotes a projection or tip—as seen in detailed discussions of dental anatomy where albeit minor differences in shape carry significant meaning [1][2][3]. In architectural and ornamental descriptions, the word captures the essence of decorative points that punctuate design, such as in the elegant finials of a moulding or the intricate tracery of a window [4][5]. Meanwhile, in astrological writings, "cusp" marks the border between celestial houses or signs, symbolizing an intersection where contrasting qualities merge [6][7][8]. Even in poetic settings, it suggests a moment on the verge of transition, an edge where light or shadow defines the boundary of perception [9][10].