U·su·ma·cin·ta 
(′sə-mə-sĭntə, -s-mä-sēntä)
(′sə-mə-sĭntə, -s-mä-sēntä) A river, about 965 km (600 mi) long, rising in a confluence of streams along the Guatemala-Mexico border and flowing northwest through southeast Mexico to the Gulf of Mexico.
- electromagnetic spectrum
- electromagnetic unit
- electromagnetic wave
- electromagnetism
- electromechanical
- electrometallurgical
- electrometallurgy
- electrometer
- electromotive
- electromotive force
- electromyogram
- electromyograph
- electromyographic
- electromyographically
- electromyography
- electron
- electron amplifier
- electron carrier
- electronegative
- electron gun
- electron hole
- electronic
- electronica
- electronically
- electronic fetal monitor