sand clocks
Grain-filled timers
Sand clocks are timekeeping devices that measure intervals by letting sand flow from one chamber to another through a narrow passage.
The hourglass is the most familiar type.
The term emphasizes the material rather than the shape, covering any sand-based timer: The sand clock on her desk measured three-minute intervals for brewing tea.
- sandglassGrain-based timing device
- granulesSmall discrete particles
- hourglassGravity-powered sand timer
- timekeeperDuration-measuring person or device
- flowUnbroken forward movement
museum artifacts · trickle · measurements · three minutes · grains · glass bulb · chronometer · slip away · intervals · top · turn · maritime navigation · timepiece · neck · vanitas · sundials · bulbs · mortality
sand clocksdigital clocks
Electronic time readouts
atomic clocks · smartwatches · digital watches · quartz clocks · digital displays
sand, clocks, sands, sandy, sandier, sandiest, sanded, sanding, clock