ELF

Từ điển Oxford Learners Wordfinder Dictionary

noun

below 3 kilohertz
• Syn:
extremely low frequency
• Hypernyms:
radio frequency
• Part Holonyms:
electromagnetic spectrum

• Từ đồng nghĩa / Synonyms:
  extremely low frequency, ELF, hob, gremlin, pixie, pixy, brownie, imp