The act of causing.
The act or agency by which an effect is produced.
Cause and effect, considered as a system.
The beginning of something.
The proximal end of attachment of a muscle to a bone that will not be moved by the action of that muscle.
An arbitrary point on Earth's surface, chosen as the zero for a system of coordinates.
The source of a river, information, goods, etc.
Ancestry.
The point at which the axes of a coordinate system intersect.