synestia
/sɪˈnɛstɪə/
synestia noun: a donut-shaped body of vaporized and molten rock formed from the collision of two planet-sized objects.
Noun
synestia (plural synestias)
- A donut-shaped body of vaporized and molten rock formed from the collision of two planet-sized objects.
- For any rotating planetary body, there is a thermal limit beyond which the rotational velocity at the equator intersects the Keplerian orbital velocity. Beyond this corotation limit (CoRoL), a hot planetary body forms a structure, which we name a synestia, with a corotating inner region connected...2017 May 23, SJ Lock, ST Stewart, “The structure of terrestrial bodies: Impact heating, corotation limits, and synestias”, in Journal of Geophysical Research
- For a brief time during its infancy, Earth was a hot, doughnut-shaped blob called a synestia. […] A synestia has an exterior region marked by clouds of molten rock and dust, all at a scorching 2000°C or hotter.2017 June 3, Shannon Hall, “Early Earth was a molten doughnut”, in New Scientist, volume 234, number 3128, page 10
Forms of synestia
| plural | synestias |
|---|
Origin of synestia
From syn- (“together”) + Hestia.
Questions about synestia
- What does synestia mean?
- Synestia means a donut-shaped body of vaporized and molten rock formed from the collision of two planet-sized objects.
- What part of speech is synestia?
- Synestia is a noun.
- How do you pronounce synestia?
- Synestia is pronounced /sɪˈnɛstɪə/.
- What is the plural of synestia?
- The plural of synestia is synestias.
Words near synestia in the dictionary
Source and license
Adapted from Wiktionary: synestia (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.
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Cite this entry: “synestia.” Word.ws, https://word.ws/synestia. Based on Wiktionary, CC BY-SA 4.0.