Pronunciation: (ôr'i-jin, or'-),[key] —n. 1. something from which anything arises or is derived; source; fountainhead: to follow a stream to its origin. 2. rise or derivation from a particular source: the origin of a word. 3. the first stage of existence; beginning: the origin of Quakerism in America. 4. ancestry; parentage; extraction: to be of Scottish origin. 5. Anat. a. the point of derivation.
b. the more fixed portion of a muscle.
6. Math. a. the point in a Cartesian coordinate system where the axes intersect.
b. Also called pole. the point from which rays designating specific angles originate in a polar coordinate system with no axes.