¹ Source: wiktionary.com
Definition of Penumbrae
1. penumbra [n] - See also: penumbra
Lexicographical Neighbors of Penumbrae
Literary usage of Penumbrae
Below you will find example usage of this term as found in modern and/or classical literature:
1. The Annual of Scientific Discovery, Or, Year-book of Facts in Science and Art by David Ames Wells, Charles Robert Cross, John Trowbridge, Samuel Kneeland, George Bliss (1857)
"Moreover, the forms of the protuberances do not in anywise resemble those of the
penumbrae seen near the margin of the solar disk; while, on the other hand, ..."
2. The Boston Journal of Philosophy and the Arts by John White Webster, John Ware, Daniel Treadwell (1826)
"He observes that the penumbrae ... it quite certain that these spots with the
penumbrae arc on the surface of the solar globe, and that they disappear when ..."
3. The Journal of Science by Calcutta Asiatic Society (1875)
"With regard to the former, as the true penumbrae of the shadows of the satellites
is very considerable, being in the case of the nearest satellite nearly as ..."
4. Year Book by Carnegie Institution of Washington (1904)
"The granulations of the surface, the detail in the spots—both in umbrae and
penumbrae—were then very clear and steady. The appearance at this time may best ..."
5. Proceedings of the American Association for the Advancement of Science (1871)
"There are scattered upon it small dark spots, which are in a state of continual
change; and again there are large black spots, surrounded by penumbrae, ..."
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