[awr-i-jin, or-]
something from which anything arises or is derived; source; fountainhead: to follow a stream to its origin.
rise or derivation from a particular source: the origin of a word.
the first stage of existence; beginning: the origin of Quakerism in America.
ancestry; parentage; extraction: to be of Scottish origin.
the point of derivation.
the more fixed portion of a muscle.
the point in a Cartesian coordinate system where the axes intersect.
Also called pole. the point from which rays designating specific angles originate in a polar coordinate system with no axes.

1350–1400; Middle English < Latin orīgin- (stem of orīgō) beginning, source, lineage, derivative of orīrī to rise; cf. orient

1. root, foundation. 4. birth, lineage, descent.

1. destination, end.
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World English Dictionary
origin (ˈɒrɪdʒɪn)
1.  a primary source; derivation
2.  the beginning of something; first stage or part
3.  (often plural) ancestry or parentage; birth; extraction
4.  anatomy
 a.  the end of a muscle, opposite its point of insertion
 b.  the beginning of a nerve or blood vessel or the site where it first starts to branch out
5.  maths
 a.  the point of intersection of coordinate axes or planes
 b.  See also pole the point whose coordinates are all zero
6.  commerce the country from which a commodity or product originates: shipment from origin
[C16: from French origine, from Latin orīgō beginning, birth, from orīrī to rise, spring from]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Word Origin & History

early 15c., from Fr. origine, from L. originem "rise, beginning, source," from oriri "to rise" (see orchestra).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

origin or·i·gin (ôr'ə-jĭn)

  1. The point at which something comes into existence or from which it derives or is derived.

  2. The fact of originating; rise or derivation.

  3. The point of attachment of a muscle that remains relatively fixed during contraction.

  4. The starting point of a cranial or spinal nerve.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
origin   (ôr'ə-jĭn)  Pronunciation Key 
The point at which the axes of a Cartesian coordinate system intersect. The coordinates of the origin are (0,0) in two dimensions and (0,0,0) in three dimensions.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
Searching for their origin should be given as much scientific rigor as
  researching other natural phenomenon.
Nationality and national origin may be different, but for purposes of
  employment the distinction may not make a difference.
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