Found 2 items, similar to ER.
English → English (WordNet) Definition: Er Er n 1: a trivalent metallic element of the rare earth group; occurs with yttrium [syn: erbium, atomic number 68] 2: a room in a hospital or clinic staffed and equipped to provide emergency care to persons requiring immediate medical treatment [syn: emergency room]
English → English (gcide) Definition: Er Er \Er\ n. the chemical symbol for erbium, a rare earth element. It has atomic number 68 and an atomic weight of 167.26. Syn: erbium. [WordNet 1.5 +PJC]