Phrase guide
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Sound
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noun
A supernova whose spectrum lacks, or is highly deficient in, hydrogen lines, and where the star has already blown away its outer hydrogen envelope, having exposed the lower enveloping helium layer, prior to the explosion.
Definition source: English Wiktionary via Wiktextract
Topics: astronomy, natural-sciences
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
History
No etymology was provided for this word.
