noun, plural: origins
(1) The birth, existence, or beginning; starting point.
(2) The cause; that which causes something to arise.
(3) That which acts as the source or that which from where something is derived.
(4) (anatomy) The point of attachment, as the end of the muscle (when contracted).
Word origin: L orīgin- (s. of orīgō) beginning, source, lineage
Compare: insertion (anatomy)