• axis ⪢⪢
We are not counting the rotation around the axis joining the two atoms.
http://qindex.info/i.php?x=16224

○○○ denote ⪢⪢
The distance along the horizontal axis also called the real axis denotes the real part of a complex number.
http://qindex.info/i.php?x=10088

○○○ heliocentric ⪢⪢
In a heliocentric model the Sun, not the Earth, is in the center and all other objects including the Earth orbit the Sun. In this model the Earth is moving in two ways. It revolves arround the Sun and it also rotates on an axis. ￫ spin
http://qindex.info/i.php?x=14014

Google ➔ Dictionary ➔ Image ➔ YouGlish