Er (Noun)
Meaning 1
A room in a hospital or clinic staffed and equipped to provide emergency care to persons requiring immediate medical treatment.
Classification
Nouns denoting man-made objects.
Examples
- The nurse rushed the patient to the ER as soon as the ambulance arrived.
- The hospital's ER was flooded with patients injured in the multi-car accident.
- After falling and hitting her head, Sarah was taken to the ER for a CT scan.
- The doctor worked a long shift in the ER, treating everything from broken bones to severe allergic reactions.
- The hospital's ER was renovated to include state-of-the-art equipment and more private treatment rooms.
Synonyms
Hypernyms
Meaning 2
A trivalent metallic element of the rare earth group; occurs with yttrium.
Classification
Nouns denoting substances.
Examples
- Erbium is a silvery-white, slightly malleable and ductile metal in the middle of the lanthanide series.
- Erbium is primarily used in photochromic glass, which can change from transparent to opaque when exposed to light.
- Erbium is found in the mineral gadolinite and xenotime, which are associated with yttrium and other lanthanoids.
- Erbium can be separated by fractional crystallization of erbium(III) chloride, bromate and double magnesium nitrate salts.
- Erbium is used in high-end computer chips with low intensity red eye-safe radiation for industrial applications.