Assertion: hourglass | /r/Synonym | sand clocks
Facets:
value: sometimes
type: TEMPORAL
Source sentences:
text: Hourglasses (also called sand glasses and sand clocks) may have been used by the ancient Greeks and Romans, but history can only document the fact that both cultures had the technology to make the glass.
text: The hourglass is sometimes referred to as a sand clock or a sandglass.
text: Hourglasses (also called sand glasses and sand clocks) may have been used by the ancient Greeks and Romans, but history can only document the fact that both cultures had the technology to make the glass.