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.
Sorry, no etymologies found.
In this superb work, which placed its author on an equality with the most brilliant and illustrious astronomers, he defined and described 4015 of the nebulae and star-groups in the southern hemisphere, and 2995 of the double stars; besides entering into a variety of valuable particulars relative to Halley's comet, the solar spots, the satellites of Saturn, and the measurement of the apparent magnitude of stars.