1. An acronym for emissions of light and very low frequency perturbations due to electromagnetic pulse sources; extremely bright extremely short (less than a msec) electrical flashes forming a huge ring (up to 400 km diameter) in the ionosphere

1. (folklore) fairies that are somewhat mischievous
   - hob, gremlin, pixie, pixy, brownie, imp

1. Below 3 kilohertz
   - extremely low frequency

See also: elfin

Type of: atmospheric electricity, faerie, faery, fairy, fay, radio frequency, sprite

Part of: electromagnetic spectrum

Encyclopedia: ELF

• unattractively
• unattractiveness
• unattributable
• unau
• unauthentic
• unauthorised
• unauthorised absence
• unauthorized
• unauthorized absence
• unavailability
• unavailable
• unavailing
• unavenged
• unavoidability
• unavoidable
• unavoidable casualty
• unavoidably
• unavowed
• unawakened
• unaware
• unawareness
• unawares
• unawed
• unbacked
• unbaffled