cusp
cusp Lexical Profile
cusp Game Scores & Validity
• noun
A point of transition between two different states, periods, or conditions.
"The research team stood on the cusp of a major scientific breakthrough in renewable energy."
A pointed end where two curves meet, such as the tip of a crescent moon or a decorative point in Gothic tracery.
"The architect pointed out the delicate stone cusps adorning the cathedral's arched windows."
A pointed projection on the chewing surface of a tooth, or a triangular fold of tissue forming part of a heart valve.
"The dentist examined the worn cusps of the patient's molars during the routine checkup."
In astrology, the initial boundary line marking the transition from one zodiac sign or house to another.
"Because she was born on November 21, astrologers consider her to be born on the cusp of Scorpio and Sagittarius."
Word Origin & Etymology
Borrowed in the late 16th century from Latin cuspis, meaning 'a point, tip, or lance,' originally adopted by astrologers to denote the boundary between zodiac houses.