- A solar eclipse in which the moon covers all but a bright ring around the circumference of the sun.日环蚀：一种除了外圈有一个明亮的环，太阳的其余部分都被月亮遮住的日蚀
- electromagnetic pulse
- electromagnetic spectrum
- electromagnetic unit
- electromagnetic wave
- electromagnetism
- electromechanical
- electrometallurgy
- electrometer
- electromotive
- electromotive force
- electromyogram
- electromyograph
- electron
- electronegative
- electron gun
- electron hole
- electronic
- Electronic Data Processing College of Puerto Rico
- Electronic Data Processing College of Puerto Rico
- electronic fetal monitor
- electronic flash
- Electronic Institutes
- electronic mail
- electronic music
- electronics