A triangular protection from the intrados of an arch, or from an inner curve of tracery.
The beginning or first entrance of any house in the calculations of nativities, etc.
The point or horn of the crescent moon or other crescent-shaped luminary.
A multiple point of a curve at which two or more branches of the curve have a common tangent.
The flap or leaflet portion of any of the heart valves that forms the movable part of the valve.
a thin triangular flap of a heart valve
A segment of a heart valve.