Definition of nonionic in English:

nonionic

Syllabification: non·i·on·ic
Pronunciation: /ˌnänīˈänik/

Entry from US English dictionary

adjective

Chemistry
1Not ionic.
1.1(Of a detergent) not dissociating into ions in aqueous solution.

Definition of nonionic in:

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Word of the day anomalous
Pronunciation: əˈnɒm(ə)ləs
adjective
deviating from what is standard, normal, or expected