radiosphere

R1A1D2I1O1S1P3H4E1R1E1

noun

The expanding sphere of radiation around a supernova

OriginEnglish sphere ← Middle English spere ← Old French sphere →
Scrabble 17
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Meanings

nounradiosphere (plural radiospheres)

plural radiospheres

  1. astronomyThe expanding sphere of radiation around a supernova

Origin

  1. Englishradio-
  2. Ancient Greekσφαῖρᾰ (sphaîră)
  3. Latinsphaera
  4. Late Latinsphēra
  5. Old Frenchsphere
  6. Middle Englishspere
  7. Englishsphere
  8. Englishradiosphere

From radio- + -sphere.

Full word history & related roots →
Cite this entry
APA

radiosphere. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/radiosphere

MLA

“radiosphere.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/radiosphere. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “radiosphere,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/radiosphere.

Source: radiosphere on Wiktionary, CC BY-SA 4.0.