'Sandglass' definitions:

Definition of 'sandglass'

(from WordNet)
noun
Timepiece in which the passage of time is indicated by the flow of sand from one transparent container to another through a narrow passage

Definition of 'Sandglass'

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