>>1217719>>1217720Except (you)(you)'re both wrong. Eccentric means off center.
This is an example of an eccentric chainring:
https://bikerumor.com/2018/06/21/spreng-reng-flouts-conventional-chainring-design-w-single-sided-power-stroke/Ovals have centers. If the chainring rotates around the center it is not eccentric.
I'm guessing you never passed grade school, but an eccentric orbit is an oval, and an oval orbit is eccentric because the larger body being orbited lies at one of the two focuses of an ellipse neither of which are the center.
That or you're a math autist and studied upper division math, but don't understand what eccentricity actually means. The ellipse itself is not actually eccentric except as a cross section of a conic section and like many math terms derived from English, it's a bit of a misnomer. You should note that as a conic section, the central axis does not pass through the center of the ellipse, hence it is eccentric. But math autists always think they know more than everyone else.