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Hint: Question mark (?) is a wildcard. Question mark substitutes one character.
English
noun
:
butyl
1.
butyl
(substance)
a hydrocarbon radical (C4H9)
Broader (hypernym)
chemical group
,
group
,
radical
Substance holonym
isobutylene
Based on WordNet 3.0 copyright © Princeton University.
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. English edition:
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.
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