Phrase guide
Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.
Sound
Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.
No pronunciation record was provided for this word.
noun
A rotating black hole that extracts energy from its rotation and magnetic fields to emit a jet of particles and radiation.
Definition source: English Wiktionary via Wiktextract
Topics: astronomy, astrophysics, cosmology, natural-sciences
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
History
An initialism of Roger Blandford and Roman Znajek, theoretical astrophysicists.
