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Hint: Question mark (?) is a wildcard. Question mark substitutes one character.
English
noun
:
watt-hour
1.
watt-hour
(quantity)
a unit of energy equal to the power of one watt operating for one hour
Broader (hypernym)
energy unit
,
heat unit
,
work unit
Part meronym
B.T.U.
,
Board of Trade unit
,
kilowatt hour
,
kW-hr
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