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a detached and rounded or worn rock, especially a large one.
a city in N Colorado.
Contemporary Examples

New Questions in JonBenet’s Murder Christine Pelisek October 3, 2010
The Call Never Came Michael D. Brown, Ted Schwarz August 27, 2010
New Clues in JonBenet Ramsey Murder Carol McKinley July 17, 2012
Channing Tatum and Jonah Hill on ‘22 Jump Street,’ Penis Kissing, and Julie Andrews’s Boobs Kevin Fallon June 9, 2014
Right Decision, Wrong Reason Paul Campos April 3, 2009

Historical Examples

The Cross-Cut Courtney Ryley Cooper
The World Beyond Raymond King Cummings
With Our Army in Palestine Antony Bluett
Loot of the Void Edwin K. Sloat
The Dueling Machine Benjamin William Bova

a smooth rounded mass of rock that has a diameter greater than 25cm and that has been shaped by erosion and transported by ice or water from its original position
(geology) a rock fragment with a diameter greater than 256 mm and thus bigger than a cobble


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  • Boulder-dam

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