See Also: hourglass(dictionary)
hourglass(dictionary)
hourglass contraction(medicine)
hourglass head(medicine)
hourglass murmur(medicine)
hourglass pattern(medicine)
hourglass stomach(medicine)
hourglass vertebrae(medicine)

hourglass (iou)



hourglass noun & adjective. E16.
[from HOUR + GLASS noun.]
A. noun. A device for measuring time, consisting of two glass etc. bulbs joined by a narrow neck, the upper bulb containing grains of sand which travel into the lower bulb in the space of an hour; fig. (arch.) the space of an hour, a strictly finite period of time. E16.
b. attrib. or as adjective. Shaped like an hourglass, constricted or narrowed in the middle. E19.