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The Adobe Flash Player is required in order to view this content. You can get it here: hourglassMain Entry: 1hour·glass Pronunciation: \ˈau̇(-ə)r-ˌglas\ Function: noun Date: circa 1515 : an instrument for measuring time consisting of a glass vessel having two compartments from the uppermost of which a quantity of usually sand runs in an hour into the lower one 
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