synestia

== English == === Etymology === From syn- (“together”) +‎ Hestia. === Pronunciation === IPA(key): /sɪˈnɛstɪə/ === Noun === synestia (plural synestias) (astrophysics) A donut-shaped body of vaporized and molten rock formed from the collision of two planet-sized objects. === Anagrams === Yantises