تعريف sand-glass في الإنجليزية الإنجليزية القاموس.
{i} hourglass, device for measuring time which consists of two glass bulbs joined by a narrow passage through which a quantity of sand or liquid passes in one hour
{i} hourglass, device for measuring time which consists of two glass bulbs joined by a narrow passage through which a quantity of sand or liquid passes in one hour