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nonvolatile

[non-vol-uh-tl, -til or, esp. British, -tahyl]
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adjective
  1. not volatile.
  2. (of computer memory) having the property of retaining data when electrical power fails or is turned off.

Origin of nonvolatile

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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Word Origin and History for non-volatile

adj.

also nonvolatile, 1837, from non- + volatile.

Online Etymology Dictionary, © 2010 Douglas Harper