sandglass

from WordNet (r) 3.0 (2006)

sandglass
    n 1: timepiece in which the passage of time is indicated by the
         flow of sand from one transparent container to another
         through a narrow passage

from The Collaborative International Dictionary of English v.0.48

Sandglass \Sand"glass`\, n.
   An instrument for measuring time by the running of sand. See
   {Hourglass}.
   [1913 Webster]

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