electron beam

Từ điển WordNet v3.1 - WordNet Dictionary

noun

a group of nearly parallel lines of electromagnetic radiation
• Syn:
beam, ray
• Derivationally related forms:
ray (for: ray)
• Hypernyms:
electromagnetic radiation, electromagnetic wave, nonparticulate radiation
• Hyponyms:
cathode ray, particle beam

• Từ đồng nghĩa / Synonyms:
  beam, ray