Definition of Thuban
: a white giant star of the fourth magnitude that is visible in the constellation Draco Engineers had determined that these standing stones predict solar and lunar events as well as the position of Thuban, the polestar in ancient Phoenician times. — Karen Wright, Discover, February 1998 —called also Alpha Draconis ◆From about 4000 BC through 1800 BC, Thuban was the star closest to the north celestial pole. It was used (instead of Polaris) as the polestar during that time. The movement of the earth has caused it to drift away, but in another 20,000 years, it will once again qualify as the “North Star.”
Love words? You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.
Start your free trial today and get unlimited access to America's largest dictionary, with:
- More than 250,000 words that aren't in our free dictionary
- Expanded definitions, etymologies, and usage notes
- Advanced search features
- Ad free!
First Known Use of thuban
Seen and Heard
What made you want to look up Thuban? Please tell us where you read or heard it (including the quote, if possible).