cusp
/kʌsp/ noun, verb
Forms cusps cusping cusped
- noun A sharp point or pointed end.
- noun (figuratively) An important moment when a decision is made that will determine future events.
- noun (geometry) A point of a curve where the curve is continuous but has no derivative, but such that it has a derivative at every nearby point.
- noun (architecture) A point made by the intersection of two curved lines or curved structures, a common motif in Gothic architecture.
- noun (astrology) A boundary between zodiacal signs and houses.
- noun (dentistry) Any of the pointed parts of a canine tooth or molar.
- noun (anatomy) A flap of a valve of a heart or blood vessel.
- noun A point of transition.
- verb (slang) To behave in a reckless or dangerous manner.
Synonyms
Etymology
From Latin cuspis (“a point, spear, pointed end”); first used in astrology. Doublet of cuspid and cuspis.
Webster’s 1913
- noun A triangular protection from the intrados of an arch, or from an inner curve of tracery.
- noun The beginning or first entrance of any house in the calculations of nativities, etc.
- verb To furnish with a cusp or cusps.
Etymology [L. cuspis, -idis, point, pointed end.]
Sources: Wiktionary · WordNet 3.0 · Webster’s 1913 — from the Wiktionary entry “cusp”, CC BY-SA 4.0. Details