|Please note that this is the Dragon Ball Universe Wiki's article on Zeno, the measuring unit. If you are looking for the article on the ruler of all twelve universe then you should head to Zen'ō.|
The Zeno (ゼノ) is a unit used to measure waves of full celestial light. According to Vegeta, 17 million Zenos per second is the prerequisite amount that a Saiyan needs to absorb through their retinas to trigger the gland in their tail which will transform them into a Great Monkey.
- ↑ Dragon Ball chapter 232, pp. 10