bis-


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bis-

pref.
Two. Used especially in chemical nomenclature instead of di- when referring to a complex structural feature: bisphenol.
[Latin, twice; see dwo- in Indo-European roots.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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Mono, bis- and triphosphate esters of the above mentioned phenol have been prepared by the standard method (Bunton et al., 1967).
[S.sub.N]2 mechanism of cationic micelles on the hydrolysis of bis-p-methoxyphenyl phosphate ester

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