This mixed system of opinion and sentiment had its origin in the ancient chivalry. Burke.

Origin of coördinate axes (Math.), the point where the axes intersect. See Note under Ordinate.

Syn. -- Commencement; rise; source; spring; fountain; derivation; cause; root; foundation. -- Origin, Source. Origin denotes the rise or commencement of a thing; source presents itself under the image of a fountain flowing forth in a continuous stream of influences. The origin of moral evil has been much disputed, but no one can doubt that it is the source of most of the calamities of our race.

I think he would have set out just as he did, with the origin of ideas -- the proper starting point of a grammarian, who is to treat of their signs. Tooke.

Famous Greece,
That source of art and cultivated thought
Which they to Rome, and Romans hither, brought. Waller.