Er

Từ điển Oxford Learners Wordfinder Dictionary

noun

a trivalent metallic element of the rare earth group;
occurs with yttrium
• Syn:
erbium, atomic number 68
• Hypernyms:
metallic element, metal
• Substance Holonyms:
gadolinite, ytterbite, fergusonite

• Từ đồng nghĩa / Synonyms:
  emergency room, ER, erbium, Er, atomic number 68