cusp

cusp is defined in Webster's Unabridged Dictionary (1913) with 6 senses. The full text of each entry is reproduced verbatim below.

Definitions

  1. 1.(Astrol.) The beginning or first entrance of any house in the calculations of nativities, etc.
  2. 2.(Astron) The point or horn of the crescent moon or other crescent-shaped luminary.
  3. 3.(Math.) A multiple point of a curve at which two or more branches of the curve have a common tangent.
  4. 4.(Anat.) A prominence or point, especially on the crown of a tooth.
  5. 5.(Bot.) A sharp and rigid point.
  6. 6.To furnish with a cusp or cusps.

Source: Webster's Unabridged Dictionary, 1913 edition (public domain, via GCIDE / Project Gutenberg).

Related questions

Reverse-dictionary questions

Definition-first questions whose answer is cusp.

Sources