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preservative

[pri-zur-vuh-tiv]
noun
1.
something that preserves or tends to preserve.
2.
a chemical substance used to preserve foods or other organic materials from decomposition or fermentation.
adjective
3.
tending to preserve.

Origin:
1350–1400; Middle English (adj. and noun) < Middle French preservatif (adj.) < Medieval Latin praeservātīvus. See preserve, -ative

nonpreservative, adjective
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World English Dictionary
preservative (prɪˈzɜːvətɪv)
 
n
1.  something that preserves or tends to preserve, esp a chemical added to foods to inhibit decomposition
 
adj
2.  tending or intended to preserve

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

preservative pre·ser·va·tive (prĭ-zûr'və-tĭv)
n.
A substance added to food products or to organic solutions to prevent decomposition due to chemical change or bacterial action.

The American Heritage® Stedman's Medical Dictionary
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