ER
erbium, Er, atomic number
(noun) a trivalent metallic element of the rare earth group; occurs with yttrium
Source: WordNet® 3.1
Etymology
Mimetic (sound of hesitation)
Interjection
er
Said when hesitating in speech.
Verb
er (third-person singular simple present ers, present participle erring, simple past and past participle erred)
(informal) To utter the word "er" when hesitating in speech, found in the phrase um and er.
Anagrams
• 're, RE, Re, Ré, r.e., re, re-
Proper noun
ER (plural er-noun)
Initialism of Elizabeth Regina. (Queen Elizabeth)
(sports) Abbreviation of Erie. (Erie, Pennsylvania, USA)
Synonyms
• (Elizabeth Regina): EIIR (Elizabeth II)
Noun
ER (countable and uncountable, plural ERs)
(baseball) The statistic "Earned Run" (a run that was scored without the aid of an error by the fielding team that is charged to the pitcher responsible for allowing the runner that scored to reach base.)
(biology) Initialism of Endoplasmic Reticulum.
(computing) Initialism of Entity-Relationship.
(medicine) Initialism of emergency room.
(physics) Initialism of Einstein-Rosen bridge.
(military) Initialism of enhanced radiation.
Hyponyms
• (computing): EER
Anagrams
• 're, RE, Re, Ré, r.e., re, re-
Source: Wiktionary