1. Noun.  The beginning of something.
  2. Noun.  The source of a river, information, goods, etc.
  3. Noun.  (mathematics) The point at which the axes of a coordinate system intersect.
  4. Noun.  (anatomy) The proximal end of attachment of a muscle to a bone that will not be moved by the action of that muscle.
  5. Noun.  (cartography) an arbitrary point on the earth's surface, chosen as the zero for a system of coordinates.
  6. Noun.  (in the plural) ancestry.

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This entry was last updated on RefTopia from its source on 3/20/2012.