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sandbox

[sand-boks] /ˈsændˌbɒks/
noun
1.
a box or receptacle for holding sand, especially one large enough for children to play in.
Origin
1565-1575
1565-75; sand + box1
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for sandboxes

sandbox

/ˈsændˌbɒks/
noun
1.
a container on a railway locomotive from which sand is released onto the rails to assist the traction
2.
a box with sand shaped for moulding metal
3.
a container of sand for small children to play in
4.
(computing) a protected environment in which an untrusted program may be run without affecting other parts of the system
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for sandboxes

sandbox

n.

also sand-box, 1570s as an instrument to sprinkle sand, from sand (n.) + box (n.1). From 1680s as "a box holding sand;" 1891 as a low-sided sand pit for children's play.

Online Etymology Dictionary, © 2010 Douglas Harper
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19
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