Battani[bə-täˈnē], al- 858?-929.
The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
, al- 858?-929.
Arab astronomer and mathematician. Considered the greatest astronomer of his time, he proved the possibility of annular eclipses and introduced an organized table of sines.