Dictionary term
Hourglass
Direct answer
Hourglass is a sealed pair of bulbs in which sand passes through a narrow opening to measure a fixed interval.
Hourglass is a sand-flow interval timer used in historical astronomy, timekeeping, or navigation.
Hourglass is a sand-flow interval timer used in historical astronomy, timekeeping, or navigation.
An engraved functional orientation; the page explains the real instrument, method, or publication.Quick reference
- Use when
- Use Hourglass by starting from a fully settled charge and turning it promptly at each completed interval.
- Do not use it for
- Tilt, moisture, static, damaged grains, and late turning accumulate error over repeated intervals.
- Reference category
- Historical Almanacs & Instruments
- Related terms
- Clepsydra, Water Clock, Compass Rose, Magnetic Compass
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The story behind Hourglass
Sandglasses were used aboard ships and in workshops, churches, households, and scientific practice.
Hourglass in spiritual tradition
Hourglass rewards careful observation, explicit assumptions, and humility about the limits of every model or measurement.
Hourglass: fact and faith, kept distinct
This is a factual history-of-science, instrument, timekeeping, or navigation reference. It may support wonder and disciplined attention without becoming a claim of fate, worship, or private revelation.
Hourglass in numerology
Hourglass is not a numerology claim. Any numbers attached to it should retain their ordinary scientific, calendrical, navigational, or historical meaning unless a separate symbolic interpretation is clearly labeled.
Why Hourglass matters
Hourglass matters because its portable repeatability helped organize watches, observations, and short procedures without sky visibility.
Hourglass at work: an example
A half-hour glass can mark segments of a ship's watch alongside course and speed records.
Where interpretation stops
Hourglass is presented as sourced astronomy, calendrical, Earth-science, cultural, or instrument-history reference. Definitions should distinguish measured phenomena from civil convention and historical interpretation, preserve location and time dependencies, and avoid turning factual sky data into a deterministic personal claim.
Sources and editorial method
Research references used for this entry include:
- Royal Museums Greenwich: A Unique History of Timekeeping - Museum overview of marine chronometers, astronomical regulators, and the development of precision timekeeping.
- Royal Museums Greenwich: Traverse Board - Museum documentation of the peg board used to record a vessel's course and speed by watch.
- Source
- The Great Almanac Dictionary
- Category
- Historical Almanacs & Instruments
- Also appears in
- Historical Almanacs & Instruments
- Aliases
- None listed
- Last updated
- 2026-07-16
Explore Hourglass
Hourglass in a book is one thing; Hourglass in your own birth chart is your life. The Oracle casts your real chart and tells you what it means for your love, your work, and your year ahead, in conversation, free.
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Common questions
What is Hourglass?
Hourglass is a sealed pair of bulbs in which sand passes through a narrow opening to measure a fixed interval.
How is Hourglass used in an almanac?
Use Hourglass by starting from a fully settled charge and turning it promptly at each completed interval.
What should I avoid when interpreting Hourglass?
Tilt, moisture, static, damaged grains, and late turning accumulate error over repeated intervals.
