A lot vs. Alot: 9 Grammatical Pitfalls
1580s, from Latin cuspis "point, spear, pointed end, head," of unknown origin. Astrological use is earliest.
cuspal cusp·al (kŭs'pəl)
Relating to a cusp.
A pointed or rounded projection on the chewing surface of a tooth.
A triangular fold or flap of a heart valve.