hourglass(redirected from Sand timer)
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An instrument for measuring time, consisting of two glass chambers connected by a narrow neck and containing a quantity of sand, mercury, or another flowing substance that trickles from the upper chamber to the lower in a fixed amount of time, often one hour.
Shaped like an hourglass: an hourglass design; an hourglass figure.
1. (Horology) a device consisting of two transparent chambers linked by a narrow channel, containing a quantity of sand that takes a specified time to trickle to one chamber from the other
2. (modifier) well-proportioned with a small waist: an hourglass figure.
hour•glass(ˈaʊərˌglæs, -ˌglɑs, ˈaʊ ər-)
1. an instrument for measuring time, consisting of two bulbs of glass joined by a narrow passage through which a quantity of sand or mercury runs in just an hour.adj.
2. having or indicating the shape of this instrument: a woman with an hourglass figure.