ringdown

English

Etymology

ring +‎ down

Noun

ringdown (plural ringdowns)

1. (astronomy) The stage in a black hole merging event where the gravitational wave amplitude reaches its peak.
2. (telecommunications) A signal to a telephone operator that both rings a bell and allows a relay to drop.

Further reading

• Binary black hole on Wikipedia.Wikipedia
• Ringdown on Wikipedia.Wikipedia

Anagrams

• drowning, wondring