Umbriel

Um·bri·el

[uhm-bree-el]
noun Astronomy.
a moon of the planet Uranus.
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World English Dictionary
Umbriel (ˈʌmbrɪəl) [Click for IPA pronunciation guide]
 
n
one of the main satellites of Uranus

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Umbriel is always a great word to know.
So is bezoar. Does it mean:
an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.
a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.
Encyclopedia Britannica
Encyclopedia

umbriel

third nearest of the five major moons of Uranus and the one having the darkest and oldest surface of the group. Its discovery is attributed to the English astronomer William Lassell in 1851, although the English astronomer William Herschel, who discovered Uranus and its two largest moons, may have glimpsed it more than a half century earlier. Umbriel was named by Herschel's son, John, for a character in Alexander Pope's poem The Rape of the Lock

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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