Meanings
nounpreplanetary nebula (plural preplanetary nebulae or preplanetary nebulas)
plural preplanetary nebulae · plural preplanetary nebulas
- astronomyA stage in stellar evolution when a star starts to shed its outer layers before coming a true planetary nebula.
Synonyms: protoplanetary nebula
Synonyms & antonyms
nounA stage in stellar evolution when a star starts to shed its outer layers before coming a true planetary nebula.
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Origin
Cite this entry
APA
preplanetary nebula. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/preplanetary%20nebula
MLA
“preplanetary nebula.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/preplanetary%20nebula. Accessed November 4, 2026.
Chicago
WatkinsX Dictionary, s.v. “preplanetary nebula,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/preplanetary%20nebula.
Source: preplanetary nebula on Wiktionary, CC BY-SA 4.0.