What does the notation $\mathbb{Z}_{(2)}$ mean?

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While I was studying on paper I saw the notation $R=\mathbb{Z_{(2)}}×\mathbb{Z}$, so what does the ring $\mathbb{Z}_{(2)}$ mean?

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It most probably means the localization of the ring $\mathbb Z$ at the prime ideal $(2)=2\mathbb Z$.

A concrete realization of this localization is the set of all rational numbers with odd denominator.