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er
 
Noun er has 2 senses
  1. erbium, Er, atomic number 68 - a trivalent metallic element of the rare earth group; occurs with yttrium
    --1 is a kind of metallic element, metal
    --1 is a substance of gadolinite, ytterbite; fergusonite
  2. emergency room, ER - a room in a hospital or clinic staffed and equipped to provide emergency care to persons requiring immediate medical treatment
    --2 is a kind of hospital room
equus caballus przewalskii equus grevyi equus hemionus equus hemionus hemionus equus kiang equus quagga equus zebra zebra equxisite er era eracestable eradiacative eradicable eradicat4e eradicate eradicated eradicating

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