English version

hourglass in Chronology topic

From Longman Dictionary of Contemporary Englishhourglasshour‧glass /ˈaʊəɡlɑːs $ ˈaʊrɡlæs/ noun [countable]  1 hourglass.jpg TMCa glass container for measuring time in which sand moves slowly from the top half to the bottom in exactly one houregg-timer2 hourglass figure
Examples from the Corpus
hourglassLike sand in an hourglass, simultaneously pulled in both directions by the mysterious appetite of a two-headed gravity.I picture the evolution of human consciousness in the shape of an hourglass.The sand has run out of the hourglass.