The meaning of the Acronym ER is...

ER is

• Electro Rheological
• Expected Runs
• Extended Range
• Extended Response
• Electronic Reserve
• Ever Ready

More Meanings For ER:

• Entity Relationship
• Escape Request
• Electronic Relationships
• Erbium
• Electron Reflectometer
• Electrode Rod
• Earth Resource
• Extra Rare
• Epichlorohydrin Rubber (Homopolymer)
• Extended Release
• Event Registration
• Easy To Read
• Edit Rotate
• Emissive And Reflective
• Epoc Release

ER is also in:

• Chat
• Chemistry
• Electronics
• Food
• General
• Meteorology
• Plastics
• Unfiled