Definitions for

Overview of noun er

The noun er has 2 senses? (no senses from tagged texts)
1. erbium, Er, atomic number 68

(a trivalent metallic element of the rare earth group; occurs with yttrium)

2. emergency room, ER

(a room in a hospital or clinic staffed and equipped to provide emergency care to persons requiring immediate medical treatment) © 2001-2013, Demand Media, all rights reserved. The database is based on Word Net a lexical database for the English language. see disclaimer
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