Jisho

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Noun
1. (police) detectiveSlang, See also 刑事
Wikipedia definition
2. Deca-Deca- or deka- (symbol da) is a prefix in the metric system, also a numerical prefix, denoting a factor of ten. The term is derived from the Greek δέκα meaning "ten". Its symbol is the only SI prefix that uses more than one character. The prefix was a part of the original metric system in 1795. It is not in very common usage, although the decapascal is occasionally used by audiologists.
Read “Deca-” on English Wikipedia
Read “デカ” on Japanese Wikipedia
Read “Deca-” on DBpedia
Other forms
デカ
Notes
でか: Gikun (meaning as reading) or jukujikun (special kanji reading).

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