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Hint: Question mark (?) is a wildcard. Question mark substitutes one character.
English
noun
:
alkene
1.
alkene
(substance)
any unsaturated aliphatic hydrocarbon
Synonyms
olefin
,
olefine
Broader (hypernym)
aliphatic compound
Narrower (hyponym)
ethene
,
ethylene
Based on WordNet 3.0 copyright © Princeton University.
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. English edition:
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.
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