from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The difference between the sum of the angles of a spherical triangle and the sum of the angles of a plane triangle.
from the GNU version of the Collaborative International Dictionary of English
- n. the amount by which the sum of the three angles of a spherical triangle exceeds two right angles. The spherical excess is proportional to the area of the triangle.
Sorry, no etymologies found.
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