from The American Heritage® Dictionary of the English Language, 4th Edition
- n. See magnitude.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. a numerical measure of the brightness of a star, planet etc.; a decrease of 1 unit represents an increase in the light received by a factor of 2.512
from the GNU version of the Collaborative International Dictionary of English
- n. Same as magnitude of a star, below.
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