Definition: Tigra calendar is a tool used by astronomers to track celestial events, such as eclipses. It's typically not about a specific animal but rather a calendar for astronomy. Definition: A calendar that shows astronomical events, including solar eclipses, in order from the start of the month to the end of the year. The word "tigra" refers to the Greek goddess of wisdom and agriculture, and her name appears as a component in many calendars from ancient times.
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