Cusps

Part of speech: noun

Pronunciation: /kʌsps/

Definitions

1. A pointed or projecting end, especially at the junction of two curves or shapes; a critical moment or turning point in time or life; in astrology, the dividing line between two different solar houses or signs
2. A sharp or tapered point formed where two curves meet; a significant transition or pivotal stage in events; in astrology, the border between two signs marking a specific influence
3. The apex of a curve where it changes direction sharply; a crucial phase that signifies change or decision-making; in astrology, the boundary separating two distinct signs or houses

Etymology: The word in question traces back to Latin, where "cuspis" referred to a point, spear, or tip—essentially the sharp end of a weapon or tool. This Latin term vividly captured the idea of something coming to a fine, distinct point, an image that carried over into English. The plural form "cusps" follows the typical English pattern of adding an "s" to the Latin-derived singular. In English, the word began to appear around the 17th century, primarily in scientific and technical contexts. It was used to describe pointed ends or projections, such as the tips of leaves, teeth, or architectural features. Over time, the meaning expanded metaphorically to signify critical points or turning moments, especially in fields like astronomy and mathematics where "cusps" denote precise boundaries or transitions—such as the point where two curves meet or the dividing line between astrological signs. The journey from a tangible, physical point to a more abstract boundary or moment of change illustrates how the term has broadened while retaining its core imagery of sharpness and precision. This transition also links it conceptually to other English words derived from Latin roots involving points and edges, though "cusps" remains distinct in its specific technical and figurative applications.

Synonyms: points, tips, peaks